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Unit IV: The Network Layer - Coggle Diagram
Unit IV: The Network Layer
has specific objectives
Understand network functions and routers
Analyze IPv4, fragmentation, and ICMP (ping)
covers key concepts such as
Layer Operation
performs tasks of
Source-to-destination routing
Packet fragmentation and reassembly
Flow/congestion control and NAT
Router
is a device that
Interconnects networks and uses routing tables
Filters packets, enforces security, and splits broadcast domains
IPv4 Protocol
is characterized by
32-bit addresses and 20-byte header
Routing protocols (OSPF, RIP, BGP) and ARP
Address exhaustion (drives IPv6 transition)
Basic ICMP (ping)
is a tool that
Sends Echo Requests and Echo Replies
Measures Round-Trip Time (RTT) and packet loss[cite: 1]