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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