Security Functions Of The OSI Model

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Register to read the introduction… It also establishes a point where a message starts and a message ends. The Transport layer is where the TCP and UDP protocols are initiated. They are the common transport protocols for this layer. The Network layer possesses flow control, error detection and error recovery. The Data link layer is responsible for the managing error messaging specific to the delivery of packets. Finally the physical layer is responsible for the physical topologies of the network. The functions of hardware in the OSI model support similar to the functions of the model layers. In the OSI model there are also Protocols and Standards. “ISO defined a group of protocols for internetworking communications based on the OSI model.” (Network Protocols Handbook, 2007, p 217-218). Application consists of BOOTP, DHCP, DNS, FTP, HTTP, HTTPS, IMAP4, PING, POP3, NSLOOKUP, NTP, SFTP, SMTP, SNPM, Telnet and TFTP. The Presentation layer consists of MIME, SSL and TLS. The Network layer consists of ARP, ICMP, IGMP, IP, IPSec and RARP. The Data Link layer possesses L2TP, PPP, PPTP and SLIP. Finally the Physical layer has IEEE 802.3, 802.5, and 802.11. These protocols are the most common in the OSI

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