Planet Technology WMRT-414 инструкция обслуживания

802.11g Wireless MIMO Broadband Router WMRT-414 User’s Manual[...]

Copyright Copyright © 2005 by PLANET T echnology Corp. All rights reserved. No p art of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or other wise, without the[...]

Federal Communication Commissi on (FCC) Radiation Exposure Statement This equipment complies with FCC radiation exposure set forth for an uncontrolled environme nt. In order to avoid the poss ibility of exceedi ng the F CC radio frequenc y exposure limits, human proximit y to the antenna shall not be les s than 20 cm(8 inches) during normal operati[...]

TABLE OF CONTENTS CHAPTER 1 INTR ODUCTION .............................................................1 1.1 P ACKAGE C ONTENTS ...................................................................................................................... 1 1. 2 F EA TURES .....................................................................................[...]

5.4.1 Basic Settings................................................................................................................. .3 4 5.4.2 Adv ance Settings ............................................................................................................. 34 5.4.3 Secur ity ..........................................................[...]

APPENDIX A NETWORK ADAPTER INFORMA TION .......77 APPENDIX B FREQUENTL Y ASK QUESTION .....................78 APPENDIX C GLOSSA R Y .........................................................80[...]

Chapter 1 Introduction Thank you for purchasin g WMRT -414. This manual gu ide s you on how to install and pr operly use the WMRT -414 in order to take full advantage of its features. 1.1 Package Contents Make sure that you have the following items: • One WMRT-414 • One AC Power Adapter • One User’s Manual CD • One Quick Installation Guid[...]

1.3 Specification - 2 - S tandard IEEE 802.1 1g/802.1 1b with MIMO technology Signal T ype DSSS (Direct Sequence S pread S pectrum) Modulation OFDM/ QPSK / BPSK / CCK WA N P o r t 1 x 10/100 Base-TX, Auto-MDI/MDI-X LAN Port 4 x 10/100 Base-TX, Auto-MDI/MDI-X Antenna connector 3 x RP-SMA connectors Data Encryption 64 bit / 128 bit WEP , WP A-PSK, WP[...]

Chapter 2 Hardware Installation Before you proceed with the installation, it is necessar y that you have enough information a bout the WMRT -414. 2.1 Hardware Connection 1. Locate an op timum location for the WMRT -414. T h e b e s t place for your WMRT -414 is usually at the center of your wireless net work, with li ne of sight to all of your mobi[...]

2.2 LED Indicators LED Color STATE MEANING On Device power on Off Device power off PWR Green Blinking During boot up procedure Blinking Transmitting or receiving d ata through the Wireless LAN WLAN Orange Off Wireless LAN is no function On WAN port is connected at 100Mbps 10/100M Green Off WAN port is connected at 10Mbps On Link is established WA N[...]

Chapter 3 Web Login A WMRT -414 with an assigned IP address allows you to monitor and co nfigure via web browser (e.g., MS Internet Explorer or Netscape). 1. Open your web browser . 2. Enter the IP address of your WMRT -414 in the address field (default IP address is http://192.168.0.1 ). 3. A User Name and Password dialog box will appear. Please e[...]

Section Description Quick Setup Select your Internet conn ection type and th en input the configurations needed to connect to your Internet Service Provider (ISP). General Setup This section contains configurations for the Broad band router ’ s advance functions such as: Port Forwarding, Virtual Server , Access Control, Hacker Attack Prevention, [...]

Chapter 4 Quick Setup This section describes the b asic co nfiguration of the WM RT -414 and allows you to co nnect to Internet easily . 4.1 Time Zone The time information is used for Log entri es and Firewall settings. Y ou can kee p the default Time Server address or set a new IP address for your router to synchronize its time. Click “Next” t[...]

4.2 Broadband Type Before establishing the Internet connection, please be sure to check with your ISP , and obtain all necessary information from them. Broadband Description Cable Modem ISP will automatically give you an IP address. Please refer to section 4.2.1 for details. Fixed-IP xDSL ISP has given you a fixed IP address already . Please ref er[...]

4.2.1 Cable Modem With Cable Modem connectio n, the ISP will automatically give you an IP address. Some ISP may also require you to fill in add itional information su ch as Host Name and MAC address (see scr een below). Note : The Host Name and MAC address section is optional and you can skip this section if your ISP does not require these settings[...]

4.2.2 Fixed-IP xDSL Select Fixed-IP xDSL if your ISP has given you a s pecified IP address. Y our ISP should provide al l the information required in this section. Parameters Description IP address assigned by your Service Provider The IP address that your ISP should provide you. Subnet Mask Enter the Subnet Mask provid ed by your ISP (e.g. 255.255[...]

4.2.3 PPPoE xDSL Select PPPoE if your ISP requires the PPPoE protocol for Internet connectivity . Y our ISP should provide all the information like user nam e, password required in this section. - 11 - Parameters Description User Name Enter the User Name provided by your ISP for the PPPoE connection. Password Enter the Password provided b y your IS[...]

packets have been sent (no one using the Inte rnet) during this specified period, the router will automatically disconnec t the connection from your ISP . Note: This “idle timeout” function may not work due to abnormal activities of some network application software, computer viru s or hacker attacks from the Internet. For example, some softwar[...]

- 13 - Parameter Description Obtain an IP address Select it if the ISP requires you to obtain an IP address by DHCP automatically . Host Name T y pe in the host name provided by your ISP if any ; otherwise, just leave it blank. MAC Address T o connect to the Internet, your ISP w ill require a MAC address from you r PC. T ype in this MAC addr ess in[...]

some network application software, comp uter virus or hacker attacks from the Internet. For example, some software se nds network p ackets to the Internet in the background, even when you are not usin g the Internet. So please turn off your computer when you are not usin g it. This function also may not work with some ISP . So please make sur e thi[...]

- 15 - button to replace the WAN port MAC addr ess with the MAC address of that PC. T o find out the PC’s MAC address, see Appendix A. (also s ee Glossary for an explanation on MAC address. Use the following IP address Select it if the ISP provides you a st atic IP to connect to the L2TP server . IP Address This is the IP address that your ISP ha[...]

When the configuration finishe d ple ase click “OK” to next step or click “Back” to previous step. After press “OK”, you will see a web screen to pro mpt you the configurations s ave successfully . Please refer to section 4.2.7 for the information of this screen. 4.2.6 T elstra Big Pond Select T elstra Big Pond if you are liv e i n Aust[...]

Please wait for 30 seconds for WMRT -414 restart. After restart procedure finished, please click “OK” to return to HOME screen . - 17 -[...]

Chapter 5 General Setup After click on the “General Setup” button at the main Page, you should see the screen belo w . The General Setup contains advanced features that allow you to conf igur e the router to meet the network’ s needs such as: Wireless, Port Forwarding, Virtual Server , Access Control, UR L Blocki ng, S pecial Applications, DM[...]

5.1 System This section shows how to setup the Broadband ro ut er ’s system T ime Zone, Password and Remote Management Administrator . - 19 -[...]

5.1.1 Time Zone The T ime Zone allo ws WMR T -414 to all ocate its time wi th the settings configured; it will af f ect log display functions such as Security Log and Fire wall settings. Parameter Description Set T ime Zone Select the time zone of the country you are c urrently in. The router will set its time based on your selection. T ime Server [...]

5.1.2 Password Setup This screen allows you to cha nge the ma nagement password. Parameters Description Current Pass word Enter your current password for the remote management administrator to login to your Broadba nd router . Ne w Pa ss wo rd E nt er you r n ew pas s wo rd . Confirmed Password Enter your ne w passwo rd again for verifi cation purp[...]

5.1.3 Remote Management Y ou can specify a Host IP address that can perform remote management from Internet. Parameters Description Host Address The IP address of the host on Inter net that will have mana gement / configuratio n access to the Broadband router . Leave it to 0.0.0.0 means anyone can access the router ’s web-based configuration from[...]

5.2 WAN The WAN Settings screen allows you to specif y the ty pe of Internet connection. T he W AN settings of fer the following selections for the router ’s W AN port, Dynamic IP , St atic IP , PPPoE , PPTP , L2TP , and T elstra Big Pond . Please select one of the connection type s and click “More Confi guration” button or select the option [...]

5.2.1 Dynamic IP If Dynamic IP is selected, your ISP will automatically give you an IP address. Some ISP’s may also require that you fill in additional information such as Host Name, Domain Name and MAC address. Please refer to the section 4.2.1 for more settings of this option. - 24 -[...]

5.2.2 St atic IP If S tatic IP is selected, your ISP should provide al l the information required in this screen. Please refer to the section 4.2.2 for more settings of this option. - 25 -[...]

5.2.3 PPPoE Select PPPoE if your ISP requires PPPoE protocol to connect to the Internet. Y our ISP should provide all the information required in this section. Ple ase refer to the section 4.2.3 to know the detail settings of this option. - 26 -[...]

5.2.4 PPTP Select PPTP if your ISP requires the PPTP protocol to connect to the Internet. Y our ISP should provide all the information required in this section. Ple ase re fer to section 4.2.4 for more settings of this option. - 27 -[...]

5.2.5 L2TP Select L2TP if your ISP requires the L2TP protocol to connect to the Interne t. Y our ISP should provide all the information required in this section. Ple ase re fer to section 4.2.5 for more settings of this option. - 28 -[...]

5.2.6 T elstra Big Pond Select T elstra Big Pond if your ISP is using this s pecial protocol. T elstra Big Pond protocol is used by the ISP in Australia. Y our ISP should provide all the in formation required i n this section. Please refer to section 4.2.6 for more settings of this option. - 29 -[...]

5.2.7 DNS A Domain Name S ystem (DNS) server is like an inde x of IP addresses and Web addresses. If you type a Web address into your browser , such as www . rout er .com, a DNS server will find that name in its index and the matching IP address. Most ISPs prov ide a DNS server for efficiency and convenience. I f your Service Provider connec ts you[...]

5.2.8 DDNS DDNS allows you to map the static domain name to a dynamic IP address. Y ou must get an account , password and your static domain name from the DDNS service pro viders. This router supports DynDNS and TZO. Parameters Description Dynam ic DNS Enable/Disable the DDNS function of this router. P r o v i d e r S e l e c t a D D N S service pr[...]

5.3 LAN The LAN Port screen below allo ws you to specify a pr ivate I P address for your router ’s LAN interface. - 32 - Parameters Description LA N IP IP Address Designate the Access Point’s IP Address. This IP Addr ess should be unique i n your network. The default IP Address is 192. 168.0.1 . Subnet Mask S pecify a Subnet Mask for your LAN s[...]

Domain Name Y ou can specify the Domai n Name for your Access Point. After configuration complete, pleas e click “Apply” butto n to save the configu ration. Then you will see a screen to prompt you the setti ngs ar e save successfu lly. You may pr ess “Continue” for configur e other settings or “Apply” to restart WMRT-414 with new confi[...]

5.4.1 Basic Settings WMRT -414 supports not only Access Point function, but also provides Bridge an d WDS mode. Pleas e Refer to “Chapter 6 W ireless Configuration ” know the details settings of w ireless Basic Settings. In Default, WMRT -414 will work with AP mode. 5.4.2 Advance Settings Y ou should not change the parameters in this screen unl[...]

Parameters Description Fragment Threshold “Fragment T hreshold” specifies the ma ximum size of packet during the fragmentation of data to be trans mitted. If you set this value too low , it will result in bad performance. RTS Threshold When the packet size is smaller the RTS threshold, the acc ess point will not use the RTS/CTS mechanism to sen[...]

5.4.3.1 WEP When you select 64-bit or 128-bit WEP key , you hav e to en ter WEP keys to encrypt data. Y ou can generate the key by yo urself. Y ou can enter four WE P ke ys and select one of them as default key . Then the access point will just allow the clients t hat with the same encryption keys connected. Y o u can use WEP encryption in “AP mo[...]

Parameter Description Encryption Please select “WEP” in this option. Key Length Y ou can select the 64 or 128-bit ke y to encrypt transmitted data. Larger WEP key length will provide higher level of securit y , but the throughput will be lower . Key Format Y ou may select to select ASCII Characters (alph anumeric format) or Hexadecimal Digits ([...]

Parameter Description Encryption If you want to use 802.1x only, keep this setting in “D isab le”. Enable 802.1x Authenticatio n Please check this option to enabl e 80 2.1x function. RADIUS Server IP Address Enter RADIUS Serer IP address. RADIUS Server Port Leave the default port setting or assign a new port number for this option. RADIUS Serve[...]

Parameter Description Encryption Please select “WPA pre-shar ed ke y” in this option. WP A (TKIP) TKIP can change the encryption key frequently to enhance the wireless LAN security . WP A2 (AES) This use CCMP protocol to change encryption key frequently . AES can provide high-level encr yption to enhanc e the wirel ess LAN security . WPA Unicas[...]

5.4.3.4 WPA RADIUS Y ou can use a RADIUS server to authentic ate wireless stations and provide the session key to encrypt data during communication. It uses TKIP or CCMP ( AES) to change the encryption key frequently . Parameter Description Encryption Please select “WPA RADIUS” in this option. WP A (TKIP) TKIP can change the encryption key freq[...]

5.4.4 Access Control WMRT -414 provides MAC Address F iltering, which prevents the unauthorized users from accessing your wireless network. Parameters Description Enable Wireless Access Control Enable or disable the MAC A ddress Filtering function. Add MAC Address to the control table In the bottom “New” area, fill in the “MAC Address” and [...]

5.5 QoS Quality of Service (QoS) refers to t he capability of providing better service to selected network traffic. The primary goal of QoS is to provide priorit y incl uding dedic ated bandwidth, controlled jitter and late ncy (required by some real-time and interactive traffic), and improved loss character istics. When using this feature, it is i[...]

5.5.1 Add/Edit QoS Rule Y ou can assign packet classification criteria by its source IP range, destination IP range, traffic type, protocol, source port range and destination port rang e parameters. The parameters that you leave as blank will be ignored. T he prio rity of this rule will be applie d to packets that match classification criteria of t[...]

port number , if you are familia r with the application protocol. Protocol Please select the protocol TCP or UDP in the list. After configuration complete, please click “Sa ve” to save the settings. Or you may press “Reset” to clear the settings to enter again. 5.6 NAT Network Address Translation (NA T) allo ws multiple user s at your local[...]

5.6.1 Port Forwarding The Port Forwarding allo ws you to re-direct a pa rticular rang e of service port numbers (from the Internet/W AN Ports) to a p articular LAN IP addr ess. It help s you to host some servers behind the firewall. - 45 - Parameters Description Enable Port Forwarding Enable Port F orwarding. Private IP This is the privat e IP of t[...]

Current Port Forwarding T able Delete Selected If you want to remove some MAC addr ess from the “Curre nt Access Control List”, select the MAC addresses you want to remove in the table and then click “Delete Selected”. Delete All If you want remove all MAC addresse s from the table, just click this button. Reset Click “Reset” will clear[...]

Note: Y ou need to give yo ur LAN PC clients a fixed/static IP address for Virtual Server to work properly . Private Port T his is the port number (of the above Private IP host) that the below Public Port number will be changed to when the packet enters your LAN (to the LAN Server/Client IP). T ype Select the port number protocol type ( TCP , UDP o[...]

5.6.3 Special Applications Some applications require multiple co nnections, su ch as Internet games, video conferencing, Internet telephony and others. In this section you can confi gure the router to support multipl e connections for these types of applications. - 48 - Parameters Description Enable T rigger Port Enable the S p e cial Application f[...]

for this popular application int o the input fields. Add Add the settin gs into the “Current T rigger Port T able”. Reset Click “Reset” will clear your current settings to allows you to enter aga in. Current T rigger Port T able Delete Selected If you want to remove some items from th e “Current T rig ger Port T able” , select the MAC a[...]

5.6.4 UPnP UPnP is more than just a simple extension of t he Plug and Pl ay peripheral model. It is designed to support zero-configuration, "i nvisible" networking, and automatic disc overy for a breadth of device categories from a wide range of vend ors. With UPnP , a device can dyn amically join a net work, obtain an IP address, convey [...]

5.6.5 ALG Settings Y ou can select applications th at need “Application Layer Gate way” to support. Parameters Description Enable Y ou can select to enable “Applicat i on Layer Gateway” of an application and then the router will let that application correctly pass though the NA T gat ew ay . After configuration complete, pleas e click “Ap[...]

Parameters Description Enable/Disable Y ou can select to enable or disable th e firewall function. After selected, please click “Apply” to ma ke the settings effect. - 52 - After configuration complete, pleas e click “Ap ply” button to save the configuration. T hen you will see a screen to prompt you the settings are save successfully. You [...]

5.7.1 Access Control This screen allows you to restrict users from a ccessing c ertain Internet applications/services (e.g. Internet websites, email, FTP etc. ). Network administrator can define the traffic type permitted in your LAN and control which PC client can have a ccess to these services. - 53 - Parameters Description Enable MAC Filtering C[...]

in the list below . Add PC Y ou can click “Add PC” to add an access control rule for users by IP addresses. Please refer to section 5.7.1.1. Remove PC If you want to remove some PCs f rom the "IP Filtering T able", select the PC you want to remove in the table and then click "Delete Selected". Delete All If you want to delet[...]

Note: Y ou need to give your LAN PC clients a fixed/static IP address for the Access Control rule to work properly . Client PC Service Y ou can b lock the clients from accessing some Internet services by checking the services you want to block. Protocol This allows you to select UD P , TCP or Both protocol types. Port Rang e Y ou can assign up to f[...]

be cleared. Remove URL / Keyword If you want to remove some URL ke yword from the "Current URL Blocking T able", select the URL ke yword you want to remove in the table and then click "Delete Selected". If you want re move all URL keyw ord from the table, just click "Delete All" button. If you wa nt to clear the select[...]

After configuration complete, pleas e click “Apply” butto n to save the configu ration. Then you will see a screen to prompt you the setti ngs ar e save successfu lly. You may pr ess “Continue” for configur e other settings or “Apply” to restart WMRT-414 with new configuration. 5.7.4 DMZ If you have a local client PC that cannot run an [...]

- 58 - After configuration complete, pleas e click “Ap ply” button to save the configuration. T hen you will see a screen to prompt you the settings are save successfully. You may press “Continue” for co nfigure other settings or “Apply” to restart WMRT-414 with new configuration.[...]

Chapter 6 Wireless Configuration In this chapter , you can Enable/Disa ble wireless function and configure the WMRT -414 work in different operating mode. Please refer to belo w sections to know the details configuration of each operating mode. 6.1 AP Mode - 59 - This mode is set to WMRT -414 by default. It served as a transparent Media Access Cont[...]

Parameter Description Mode Shows the current operation mode. You may set WMRT -414 to other operating mode by select other operatin g mode. Band 2.4GHz (B): It forces the WMRT-414 to operate in 80 2.11 b only. 2.4GHz (G): It forces the WMRT-414 to operate in 802.11g onl y. 2.4GHz (B+G): It allows the WMRT-414 to operate in 802.11b and 8 02.1 1g sim[...]

6.2 AP Bridge - Point to Point Mode This function allows WMRT -414 to bridge 2 wired Ethernet networks wirelessly. Parameter Description Mode Shows the current operation mode. You may set WMRT-414 to other op erating mode by select other operatin g mode. Band 2.4GHz (B): It allows to select the transmit rate up to 11Mbps. 2.4GHz (G): It allows to s[...]

6.3 AP Bridge - Point to Multipoint Mode This function allows WMRT -414 to bridge more than 2 wired Ethernet networks together b y wireless connection. Parameter Description Mode Shows the current operation mode. You may set WMRT -414 to other operating mode by select other operatin g mode. Band 2.4GHz (B): It allows to select the transmit rate up [...]

other settings or “Apply” to restart WMRT-414 with ne w configuration. 6.4 AP Bridge - WDS Mode If you want WMRT -414 to bridge to other WM RT -414 and provide access for other wireles s clients at the same time, you have to set the WMR T -414 to “AP Bridge - WDS”. Simply speaking, “AP Bridge - WDS” function is the combination of “AP [...]

Channel 1-11 (North America) Channel 1-14 (Japan) Channel 1-13 (Europe) MAC Address 1-4 If you want to bridge more than t wo wired Ethernet net works together with wireless connection, you have to enter the MAC addresses of othe rWMRT-414s that with join the bridging work into the fields. Set Securit y IF you want to ena ble secur ity to protect yo[...]

6.5.1 WEP When you select 64-b it or 128-bit WEP key , you hav e to enter WEP keys to encrypt data. Y ou can generate the key by yourself. Y ou c an enter four WEP keys and select one of them as default key . Then the access point will just allow the clients t hat with the same encryption keys co nnecte d. Parameter Description Key Length Y ou can [...]

6.5.2 WPA-PSK Wi-Fi Protected Access (WP A) is an advanced s ecuri ty standard. Y ou can us e a pre-shared key to authenticate wireless stations and encrypt data durin g com munication. It uses TKIP or CCMP (AES) to change the encryption ke y frequently . So the encryption ke y is not easy to be broken by hackers. T his can improve security very mu[...]

Chapter 7 Status The S tatus screen allo ws you to monitor the current st atus of your router . Y ou can use the S tatus page to monitor the connection status of W AN and LAN interfaces, the current firm ware and hardware version numbers, any illegal attempts to access your net work, and information o n all DHCP client PCs currently connected to yo[...]

7.1 Internet Connection View WMR T-414’ s c urrent Internet connec tion status and other related information. 7.2 Device Status - 68 - View WMR T -414’s current configuration settings. The De vic e S tatus displays the c onfiguration settin gs of WLAN and LAN.[...]

7.3 System Log This screen will show you the real -time information of WMRT -414. - 69 - Parameters Description System Log T his page show s the current sy stem log of WMRT -414. It displays the working information about WMRT -414. About the bottoms of the p age, the system log can be saved to a local fil e by press “Save” button. If there is t[...]

press “Clear” button to clear the system log . It can be refreshed to get the most updated situation by press “R efresh” button. Wh en the system is powered down, the system log will be clear ed. 7.4 Security Log View any attempts that have been made to illegally gain access to your net work. Parameters Description Security Log This page sh[...]

7.5 Active DHCP Client View your client's information that is currently linked to WMRT -414's DHCP server . Parameters Description DHCP Clie nt T able This page show s all the DHCP clients currently connected to your net w or k. The “Active DHCP Client T able” disp lays the IP address and the MAC address and Time Expired of each Clien[...]

7.6 Statistics View the st atistics of packets sent and received on WLAN, LAN and W AN. Parameters Description S tatistics Sho ws the counters of packets sent and received on WLAN, LAN and W AN. - 72 -[...]

Chapter 8 Tools This page includes the basic configuration tools, such as Config uration T ools (save or restore configuration settings), Firmware Upgrade (u pgrade system firmware) and Reset. 8.1 Configuration Tools The Configurat ion T ools screen allows you to “Back up” the router ’s current configuration setting. Saving the configuration [...]

Parameters Description Configuration T ools Use the " Backup " tool to save WMRT -414 curr ent configuration to a file named "config.bin" in yo ur PC. Y ou can then use the " Restore " tool to restore the saved configur ation to W MR T -414. T he " Restore to Factory Defaults " tool can force WMR T -414 to pe[...]

Parameters Description Firmware Upgr ade T his tool allows you to upgrade WMRT -414’s system firmware. T o upgrade the firmware of your Broadband router , you need to download the firm ware file to your local hard disk, and ent er that file name and path in the appropriate field on this page. Y ou can a lso press the “Browse…” button to fin[...]

Parameters Description Reset In the event that the system stops responding corre ctly or in some way stop s functioning, you can perform a reset. Y our s ettings will not be changed . T o perform the reset, click on the “Apply” button. Y ou will be asked to confirm your decision. The reset will be complete when the power light stops blinking. O[...]

Appendix A Network Adapter Information 1. In Window’s open the Command Prompt program. 2. T ype “ipconfi g /all” and press “Enter” key . Then you can see the inf ormation of your network adapter. Y our PC’s IP address is the one entitled IP address (192.168.0.100). The router ’s IP address is the one entitled Default Gate way (192.168[...]

Appendix B Frequently Ask Question Q. What is MIMO? A: MIMO (multiple-input multiple-output) , a technique for boo sting wireless bandwidth and range by taking advantage of multiplexing. MIMO algorithms in a radio chipset sen d information out over two or more antennas. The radi o signals reflect off objects, creating multiple paths that in convent[...]

Q. When WMRT -414 works w ith WDS mo de, can wireless connect to it? A. Y es, WDS mode is work as a AP and Bridge at t he same time. So the w ireless client can access to WDS mode WMRT -414 without problem. When wireless client connect to the remote site via WDS mode, the performance will be 50% then ac cess to the connected WDS mode WMRT -414. Jus[...]

Appendix C Glossary Access Point Access points are way stations in a wireless LAN that are c onn ected to an Ether net hub or server. Users can roam within the range of access points and th eir wireless device connections are passed from one access point to the next. Authentication Authentication refers to the verificati on of a transmitted message[...]

transferring large files or uploadi ng the HT ML pages for a Web site to the W eb server. Gateway Gateways are computers that conv ert protoc ols enabling different networks, applications, and operatin g systems to exchange information. Host Name The name given to a computer or c lient station that acts as a source for information on the net work. [...]

Messages larger than the MTU are divided i nto small er packets. NA T NA T (Network Address T ranslation - als o known as IP masquerading) enables an organiza tion to present itself to the Internet with one address. NA T c onverts the address of each LAN node into one IP address for the Internet (and vice versa ). NA T also provides a ce rtain amou[...]

Server Servers are typically powerful and fast machines t hat store programs and data. The programs and data are shared by client machine s (workstations) on the network. SMTP SMTP (Simple Mail T ransfer Protocol) is the standard Inte rnet e-mail protocol. SMTP is a TCP/IP protocol defining message format and i nclu des a message tr ansfer agent th[...]

delivery isn't necessary (for exampl e, real-time video and audio where packets can be dumped as there is no time for retransmitting the data). Vir t u a l S er v er s Virtual servers are client servers (such as Web server s) that shar e resources with other virtual serve rs (i.e., it is not a dedicated server). WEP WEP (Wired Equivalent Priva[...]