Functions of network layer routing Network_Layer.pptx

network layer

1. Functions of the Network Layer OSI Model - Layer 3

2. Introduction to Network Layer Third layer of OSI model Responsible for host-to-host delivery Provides logical addressing and routing

3. Key Responsibilities of Network Layer Logical Addressing Routing Packet Forwarding Fragmentation & Reassembly Error Handling & Congestion Control

4. Logical Addressing Assigns unique IP addresses to devices Ensures correct source and destination identification

5. Routing Determines the best path for data packets Uses routing tables and algorithms Protocols: OSPF, RIP, BGP

6. Packet Forwarding Moves packets from source to destination Hop-to-hop delivery through routers Relies on forwarding tables

7. Fragmentation & Reassembly Divides packets when size > MTU Reassembles at destination Ensures data integrity

8. Error Handling & Congestion Control Detects and reports errors (ICMP) Manages network congestion Maintains efficient data flow

9. Connection Services Provides Quality of Service (QoS) Flow control support Traffic prioritization

10. Examples of Network Layer Protocols IP (IPv4, IPv6) ICMP ARP OSPF, BGP

11. Summary Logical Addressing Routing & Packet Forwarding Fragmentation & Reassembly Error Handling & Congestion Control Connection Services

12. Thank You Questions & Answers