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Chapter 6 - Network Layer - Coggle Diagram
Chapter 6 - Network Layer
Network Layer In Communication
Transport Layer; End-to-End Transport Process
Addressing End Devices
Encapsulation
Routing
De-encapsulating
Network Layer Protocols
Common Network Layer Protocols
Internet Protocol version 4 (IPv4)
IPv4 Packet Header
Version
Differentiated Services (DS)
Time-to-Live (TTL)
Protocol
Source IP Address
Destination IP Address
IPv4 Header Fields
Internet Header Length (IHL)
Total Length
Header Checksum
Identification
Flags
Fragment Offset
Limitations of IPv4
1, IP Address Depletion
Internet Routing Table Expansion
Lack of End-to-End Connectivity
Internet Protocol version 6 (IPv6)
Advantages
Increased Addressed Space
Improved Packet Handling
Eliminates the Need for NAT
Intergrated Security
Differences Between IPv4 and IPv6
IPv4
Contains
IHL
Identification
Flags
Fragment Offset
Header Checksum
Options
Padding
IPv6
Contains
Different Name and Position
Traffic Class
Payload Length
Next Header
Hop Limit
New Thing
Flow Label
Legacy Network Layer Protocols
Novell Internetwork Packet Exchange (IPX)
AppleTalk
Connectionless Network Service (CLNS/DECNet)
Characteristics of IP
Connectionless
No connection is established before sending data packets
Best Effort (Unreliable)
No overhead is used to guarantee packet delivery
Media Independent
Operates independently of the medium carrying the data
Host Routing Tables
Default Gateaway
Direct Connection
Local Network Route
Local Default Route
Host Packet Forwarding Decision
IPv4 Host Routing Table
Router Routing Tables
Router Packet Forwarding Decision
IPv4 Router Routing Table
Directly Connected Routing Table Entries
Remote Network Routing Table Entries
Next-Hop Address
Router
Anatomy of A Router
A Router is A Computer
Router CPU and OS
Router Memory
RAM
ROM
NVRAM
Flash
Inside A Router
Router Backplane
Connecting to A Router
WAN Interface
AUX Port
LAN Interfaces
Console USB Type B
Console RJ45
LAN and WAN Interfaces
Router Boost-Up
Router Bootup Process
Configure LAN Interfaces
Verify Interface Configuration
Configuring Default Gateaway
Default Gateaway on Host
Default Gateaway on Switch