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OSI (Open Systems Interconnection)

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catnip26's version from 2017-02-07 00:53

Section

Question Answer
Layer 1 (Physical): Cables, hubsEthernet, cabling protocols, physical hardware,
Layer 2 (Data Link): SwitchesMAC, ARP, NDP, VLANs (frames, flowcontrol, discards frames with errors, VLans
Layer 3 (Network): Router, Layer 3 switchIPv4, IPv6, IPsec, ICMP (ip addresses for source and destination)
Layer 4 (Transport): TCP, UDP (end-to-end connections): provides reliability with error control, flow control and data segmentation
Layer 5 (Session)Establish, maintain, and terminate sessions
Layer 6 (Presentation)ASCII, EBCDIC
Layer 7 (Application): Proxies, appliction-proxy, firewalls, web application firewalls, web security gateways, UTM security appliancesDNS, FTP, FTPS, HTTP, HTTPS, IMAP4, LDAP, POP3, RDP, SCP, SFTP, SMTP, SNMP, SSH, Telnet, and TFTP
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