Table of Contents

Network#basic

Protocol

Web Sites


Layer

7 Application Layer

ProtocolPortExplanation
HTTP 80 HyperText Transfer Protocol
SSH 22 Secure SHell
SFTP 22 SSH File Transfer Protocol
FTP 20 File Transfer Protocol
SMTP 25
POP3 110
DNS 53 Domain Name Service
SNMP 161 Simple Network Management Protocol
DHCP 67, 68 Dynamic Host Configuration Protocol
NTP 123/udpNetwork Time Protocol


6 Presentation Layer


5 Session Layer


4 Transport Layer

ProtocolExplanation
TCP Transmission Control Protocol
UDP User Datagram Protocol


3 Network Layer

ProtocolExplanation
IP
ICMP
ARP Address Resolution Protocol


ProtocolExplanation
STP Spanning Tree Protocol
SRTP Rapid Spanning Tree Protocol
PPP Point-to-Point Protocol


1 Physical Layer