出自KMU Wiki

目錄 1 網路 1.1 Wireshark 1.1.1 Port 1.2 OSI 7 Layers 1.3 IP 1.3.1 Type of Service (ToS) Precedence 1.3.2 二進位與十進位轉換 1.3.3 Subnet 1.4 NAT 1.5 ARP & RARP 1.6 ICMP 1.7 UDP 1.8 TCP 1.9 DNS 1.10 DHCP

網路

Wireshark

Port

• ftp 21/tcp #File Transfer Protocol
• ssh 22/tcp #Secure Shell Login
• telnet 23/tcp
• smtp 25/tcp #Simple Mail Transfer Protocol
• domain 53/tcp #Domain Name Server
• http 80/tcp #World Wide Web HTTP
• pop3 110/tcp #Post Office Protocol - Version 3
• netbios-ns 137/tcp #NETBIOS Name Service
• netbios-dgm 138/tcp #NETBIOS Datagram Service
• netbios-ssn 139/tcp #NETBIOS Session Service
• imap 143/tcp imap2 imap4 #Interim Mail Access Protocol v2
  1. imap3 220/tcp #Interactive Mail Access Protocol v3
• https 443/tcp

OSI 7 Layers

CISCO的網頁中，OSI七層， 一言以敝之: "All People Seem To Need Data Processing"

• All =====> Application layer(應用層)
• People ==> Presentation layer
• Seem ===> Session layer
• To =====> Transport layer
• Need ===> Network layer
• Data ====> Data link layer
• Processing ==> Physical layer

IP

Type of Service (ToS) Precedence

• 111 Network Control
• 110 Internetwork Control
• 101 CRITIC/ECP
• 100 Flash Override
• 011 Flash
• 010 Immediate
• 001 Priority
• 000 Routine

二進位與十進位轉換

• Class A
• Class B
• Class C

Subnet

NAT

ARP & RARP

ICMP

UDP

TCP

DNS

DHCP