Computer Networks. Network Layer. Where are we?. Will Layer 2 Networking Suffice?. Motivation. Connect various link technologies to form a larger internetwork Universal addressing scheme required General purpose use Hides underlying technologies from end user
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
A router can interconnect networks that use different technologies, including different media and media access techniques, physical addressing schemes or frame formats.
Well be primarily concerned with addressing and routing
Good IP addressing tutorial: http://www.3com.com/nsc/501302.html
An IP address does not identify a specific computer. Instead, each IP address identifies a connection between a computer and a network. A computer with multiple network connections (e.g., a router) must be assigned one IP address for each connection.
Advertise 184.108.40.206/22 instead of 220.127.116.11,18.104.22.168, 22.214.171.124 and 126.96.36.199
The CIDR Report: http://www.employees.org/~tbates/cidr-report.html
Since each destination in a routing table corresponds to a network, the number of entries in a routing table is proportional to the number of networks in the internetwork. Caveat: you can use a "default" route to forward to when route is unknown or when no route specific information is available.
The destination address in a datagram header always refers to the ultimate destination. When a router forwards the datagram to another router, the address of the next hop does not appear in the datagram header.