Video Description

IP Protocol- The principal communication protocol in the TCP/IP protocol suite

  • Defines addressing to lael the datagram with source and destination IP addresses

  • Relaying datagrams (packets) across network boundaries

  • Routing function enables internetworking and essentially establishes the Internet

  • Delivers packets solely based on the IP addresses in the packet headers

  • Structures packet that encapsulates the data to be delivered

IP Address- Unique

  • Logical address

  • Bounded to the geographical location

  • Length: 32 Bits (4 bytes/octets) for version 4

  • Each byte ranges from 0 to 255

  • Categorized into classes: A, B, C, D, and E

  • Identifies single machine on the Internet

  • Used for routing from source to destination

IP Layer Devices- Router and Layer 3 Switch work in IP layer

  • Device redirects packets between networks

  • Routers forward packets based upon the destination IP address

  • Router searches the Routing Table for the destination network ID

  • Network ID = IP Address and Subnet masks

  • Routers are protocol dependent

  • Layer 3 switches are super fast routers

Routing Table- Composed of rows that are read sequentially

  • Destination network

  • Subnet mask

  • Interface

  • Gateway

  • Cost/metric

  • Can be built statically or dynamically

  • RIP and OSPF are dynamic routing protocols

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