dido:public:ra:xapend:xapend.a_glossary:r:router
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dido:public:ra:xapend:xapend.a_glossary:r:router [2021/08/13 14:19] murphy |
dido:public:ra:xapend:xapend.a_glossary:r:router [2021/10/04 13:40] (current) 50.19.247.197 ↷ Links adapted because of a move operation |
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| ===== Router ===== | ===== Router ===== | ||
| - | [[dido:public:ra:xapend:xapend.a_glossary | Return to Glossary ]] | + | [[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]] |
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| Routers are your first line of defense, and they must be configured to pass only traffic that is authorized by network administrators. The routes themselves can be configured as static or dynamic. If they are static, they can only be configured manually and stay that way until changed. If they are dynamic, they learn of other routers around them and use information about those routers to build their routing tables. | Routers are your first line of defense, and they must be configured to pass only traffic that is authorized by network administrators. The routes themselves can be configured as static or dynamic. If they are static, they can only be configured manually and stay that way until changed. If they are dynamic, they learn of other routers around them and use information about those routers to build their routing tables. | ||
| - | Routers are general-purpose devices that interconnect two or more heterogeneous networks. They are usually dedicated to special-purpose computers, with separate input and output network [[dido:public:ra:xapend:xapend.a_glossary:i:interface|interfaces]] for each connected network. Because routers and [[dido:public:ra:xapend:xapend.a_glossary:g:gateway|gateways]] are the backbone of large computer networks like the [[dido:public:ra:xapend:xapend.a_glossary:i:internet|internet]], they have special features that give them the flexibility and the ability to cope with varying network addressing schemes and frame sizes through segmentation of big packets into smaller sizes that fit the new network components. Each router interface has its own [[dido:public:ra:xapend:xapend.a_glossary:a:arp|Address Resolution Protocol (ARP)]] [[dido:public:ra:xapend:xapend.a_glossary:m:module|module]], its own LAN address (network card address) and its own [[dido:public:ra:xapend:xapend.a_glossary:i:ipaddr]]. The router, with the help of a routing table, has knowledge of routes a packet could take from its source to its destination. The routing table, like in the [[dido:public:ra:xapend:xapend.a_glossary:b:bridge|bridge]] and switch, grows dynamically. Upon receipt of a packet, the router removes the packet headers and trailers and analyzes the [[dido:public:ra:xapend:xapend.a_glossary:i:ip]] header by determining the source and destination addresses and data type, and noting the arrival time. It also updates the router table with new addresses not already in the table. The IP header and arrival time information is entered in the routing table. Routers normally work at the [[dido:public:ra:xapend:xapend.a_glossary:n:netlayer|Network layer]] of the [[dido:public:ra:xapend:xapend.a_glossary:o:osi]]. | + | Routers are general-purpose devices that interconnect two or more heterogeneous networks. They are usually dedicated to special-purpose computers, with separate input and output network [[dido:public:ra:xapend:xapend.a_glossary:i:interface|interfaces]] for each connected network. Because routers and [[dido:public:ra:xapend:xapend.a_glossary:g:gateway|gateways]] are the backbone of large computer networks like the [[dido:public:ra:xapend:xapend.a_glossary:i:internet|internet]], they have special features that give them the flexibility and the ability to cope with varying network addressing schemes and frame sizes through segmentation of big packets into smaller sizes that fit the new network components. Each router interface has its own [[dido:public:ra:xapend:xapend.a_glossary:a:arp|Address Resolution Protocol (ARP)]] [[dido:public:ra:xapend:xapend.a_glossary:m:module|module]], its own LAN address (network card address) and its own [[dido:public:ra:xapend:xapend.a_glossary:i:ipaddr]]. The router, with the help of a routing table, has knowledge of routes a packet could take from its source to its destination. The routing table, like in the [[dido:public:ra:xapend:xapend.a_glossary:b:bridge|bridge]] and [[dido:public:ra:xapend:xapend.a_glossary:s:switch|switch]], grows dynamically. Upon receipt of a packet, the router removes the packet headers and trailers and analyzes the [[dido:public:ra:xapend:xapend.a_glossary:i:ip]] header by determining the source and destination addresses and data type, and noting the arrival time. It also updates the router table with new addresses not already in the table. The IP header and arrival time information is entered in the routing table. Routers normally work at the [[dido:public:ra:xapend:xapend.a_glossary:n:netlayer|Network layer]] of the [[dido:public:ra:xapend:xapend.a_glossary:o:osi]]. |
| Source: [[https://blog.netwrix.com/2019/01/08/network-devices-explained/ ]] | Source: [[https://blog.netwrix.com/2019/01/08/network-devices-explained/ ]] | ||
dido/public/ra/xapend/xapend.a_glossary/r/router.1628878778.txt.gz · Last modified: 2021/08/13 14:19 by murphy
