Basic knowledge of networking in Linux

network knowledge involved in the Liunx

TCP/IP: divided into seven tiers

Physical Layer

Data Link Layer

Network layer

Transport Layer

Session Layer

Presentation Layer

Application Layer

TCP: There is a connection agreement to establish a logical relationship

Syn,ack,fin,rst,psh,urg

Three-time handshake:

syn=1, ack=0, fin=0

Syn=1, Ack=1, fin=0

Syn=0, Ack=1, fin=0

Four disconnects: Confirm that the communication does need to be interrupted

IPV4: Private 5 class Address network segment:

A:10.0.0.0/8

B:172.16.0.0/16; 172.31.0.0/16

C:192.168.0.0/24; 192.168.255.0/24

D:

E:

TCP Three-time handshake:

1 Plays: Syn=1, Ack=0, fin=0

2 Plays: Syn=1, Ack=1, fin=0

3 Plays: Syn=0, Ack=1, fin=0

Liunx Network Properties configuration:

Ip/netmask

Routing:

Host routing

Network routing

Default Gateway

DNS server:

Primary DNS Server

Alternate DNS Server

Basic knowledge of networking in Linux