Functions of network layer routing Network_Layer.pptx

saseln1 1 views 12 slides Oct 02, 2025
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About This Presentation

network layer


Slide Content

Functions of the Network Layer OSI Model - Layer 3

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

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

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

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

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

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

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

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

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

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

Thank You Questions & Answers