Network layer - created from Mind Map

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configuration of a Cisco router

routers

network layer protocols

routing

initial parameters

interface configuration

pre-determined gateway

switch configuration

Router configuration

similarity routers and cisco switches

Configure router interfaces

Default gateway for a host

Default gateway for a switch

The default gateway is used only when the host wants to send a packet to a device on another network

is configured on all devices that want to communicate beyond the local network

anatomy of a router

router start

A router is a computer.

The CPU and the router OS

Router memory

Interior of a router

Connection to a router

WAN and LAN interfaces

From branch

WAN

Service provider

The CPU needs an OS to provide the routing and switching functions

RAM

ROM

VRAM

Fladh

Cisco switches, routers and devices interconnect many devices

Console

Secure Shell (SSH)

Telnet

Bootset files

Process of starting the router

is modified when the network administrator performs device configurations

Realization of the POST and loading of the boot program

the IOS is stored in flash memory and copied into RAM for the CPU to run

the network layer in communications

IP protocol characteristics

IPv4 package

IPv6 package

The network layer

Network layer protocols

Addressing terminals

Encapsulation

Routing

Decapsulation

Internet Protocol version 4

Internet Protocol version 6

Encapsulamiento de IP

IP characteristics

IP: Offline

IP: Minimum service delivery

IP: Independent of the media

IP was designed as a protocol with low overhead

Offline data communications work with the same principle

IP does not have the functionality to manage or recover packages that are not received or damaged

prepare IP packets for transmission by the communication medium

IPv4 packet header

IPv4 limitations

IPv6 encapsulation

IPv6 packet header

Exhaustion of IP addresses

Expansion of the Internet routing table

Lack of complete connectivity

A lot of advantages

How do you route the host routes?

Router routing tables

The decision of host forwarding

Default gateway

Use of the default gateway

The default gateway is like the door.

dynamic way of the DHCP protocol or if it is configured manually

Decision to send router packets

IPv4 router routing table

Directly connected routing table entries

Routing table entries of remote networks

Direction of the next jump

Routes connected directly

Remote routes

Default route