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Network layer protocols
 

Network layer protocols

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    Network layer protocols   Network layer protocols Presentation Transcript

    • Network Layer Protocols
    • Internet Protocol
    • Classes of IP Address
    • Special IP Addresses
    • Example of Subnet
    • Subnet Configuration
    • Internet Control Message Protocol used by hosts & routers to • all the nodes using IP must have communicate network-level ICMP implemented information • ICMP msgs are only created for  error reporting: the first IP fragment unreachable host, network, port, protocol  warnings from routers or receivers network-layer above IP:  ICMP msgs carried in IP datagrams
    • ICMP
    • What is ARP?• Address Resolution Protocol• Protocol used to resolve address mapping between layer 3 addresses and layer 2 addresses in LAN. 9
    • Why ARP?• MAC address 48 bit unique in the LAN.• Hardware addresses are not computable from protocol address.• Used static table in ARPANET. 10
    • How ARP Works? 11
    • Proxy ARP
    • RARP
    • IGMP• IGMP is used by host receivers to join or leave a multicast host group.• IGMP is used by IPv4-based receivers.• The latest version at press time was Version 3. • IGMPv3 supports receivers that explicitly signal sources from which they wish to receive traffic.
    • IGMP OPERATION• IGMP is an asymmetric protocol.• Host Operations • To receive multicast datagrams, a host must join a group. To join a group, the host sends an IGMP membership report packet through an attached interface. 15
    • IGMP OPERATION• Multicast Router Operations • Multicast routers listen to all multicast addresses to detect membership reports. • 1. receiver (host) signals to join a group, • 2. creates an entry in the local group database. • 3. To verify group membership, multicast routers regularly send an IGMP Query message. 16
    • Thank You