Bovine family Computer network interview
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OSI protocol: physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.
TCP/IP protocol: network interface layer, Internet layer, transport layer and application layer.
The protocols of each layer are as follows:
Physical layer: RJ45, clock, IEEE802.3 (repeater, hub, gateway).
Data link: PPP, FR, HDLC, VLAN, MAC (bridge, switch).
Network layer: IP, ICMP, ARP, RARP, OSPF, IPX, RIP, IGRP, (router).
Transport layer: TCP, UDP, SPX.
Session layer: NFS, SQL, NETBIOS, RPC
Presentation layer: JPEG, MPEG, ASII
Application layer: FTP, DNS, Telnet, SMTP, HTTP, WWW, NFS.
The functions of each layer are as follows:
Physical layer: Transmission of bits through media to determine mechanical and electrical specifications (bit).
Data Link Layer: Assemble bits into frames and perform point-to-point transmission (frame frame).
Network layer: responsible for data packet transmission from source to destination and Internet interconnection (packets).
Transport layer: provides reliable end-to-end messaging and error recovery (segment).
Session layer: establish, manage and terminate sessions (session protocol data unit SPDU)
Presentation layer: translate, encrypt and compress data (representing PPDU).
Application layer: means to allow access to OSI environment (application protocol data unit APDU)