transport layer network protocol

#network common sense 

 

 

tcp, udp,  udplite,  icmp, esp,  ah, sctp or all

/etc/protocols

##Physical 1 to 1

##Link 1 to N

#Network (concept of path) 1-NN-1 (concept of no-end port)

#Transport layer TCP UDP (with the concept of ports)

 

 

network protocol layering

Layers in OSI	Function	TCP/IP protocol suite
application layer	File transfer, email, file service, virtual terminal	TFTP，HTTP，SNMP，FTP，SMTP，DNS，Telnet
presentation layer	Data formatting, transcoding, data encryption	no agreement
session layer	Release or establish contact with other contacts	no agreement
transport layer (transport layer)	Provides an end-to-end interface	TCP，UDP
Network layer	Route the packet	IP，ICMP，RIP，OSPF，BGP，IGMP
data link layer	Transmission of addressed frames and error detection	SLIP，CSLIP，PPP，ARP，RARP，MTU
physical layer	Transfer data on physical media as binary data	ISO2110，IEEE802。IEEE802.2