HICP day 3

One 、 Divide network segments
Two 、 To configure IP
1、 Write loopback    2、 Inquire about IP To configure   display ip int brief

DHCP（dhcp enable）
1、 Opening service    2、 Interface configuration
3、 configure gateway    4、 Global call
dhcp select global

default
ip route-static    Interface IP    Next jump IP

The combination of summary and default causes the loop to appear

ip route-static IP Mask NULL 0

Virtual interface              RIP Declare

Create basic acl list

Network type --- It is divided according to the protocol used in the data link layer ,

MA --- Multipoint access network                                    BMA --- Broadcast multipoint access network

NBMA --- Non broadcast multipoint access network                 p2p --- Point to point network

Ethernet protocol --- Need to use MAC Address distinguishes and marks different host devices

knowledge . --- Why Ethernet needs to be used MAC Address for data addressing , Mainly because of profit A layer-2 network using Ethernet components can contain multiple ( Two or more ) The interface of , Every Ethernet interfaces can communicate with each other through the way of interactive Ethernet frames . --- BMA

When a network can only contain two devices , Then such a network does not need to be used MAC Address Address , Such networks are called p2p The Internet .

T1 --- 1.544Mbps                E1 --- 2.048Mbps

Ethernet -- Frequency division --- So called frequency division , It means that the same transmission medium can be sent at the same time Radio waves of the same frequency band , And they don't interfere with each other . Realize the parallel transmission of data .

1 、HDLc            2 、ppp

HDLc --- Advanced data link control protocol

The standard HDLc: IsO Those that meet industrial standards issued by the organization HDLC edition

Non standard HDLc: Major manufacturers based on Standards HDLc The agreement has been improved

( By default , The encapsulation protocol used in the serial network of Cisco device components is HDLc, Huawei The default is ppp agreement .)

[r1]displayinterfaceserial4/o/o --- View the layer 2 features of the interface

[r1-serial4/o/o]link-protocolhdlc --- Modify the protocol type of layer 2

ppp --- Point to point agreement            

1、 Strong compatibility , There is a unified version , And as long as it supports full duplex serial lines, it can be encapsulated with this protocol

2 、 With strong portability

3、 Support authentication and authorization

ppp The protocol and Tcp The agreement is similar to , Before transmitting data , Need to establish ppp Conversation .

1、 Link establishment phase --- LCP establish

2、 Authentication phase --- optional

3、 Network layer protocol negotiation stage --- NCP negotiation --- NCP Agreements are the sum of a bunch of agreements call . --- IPCP agreement