Planet IGS-801T [118/120] User s manual of igs 801m

User’s Manual of IGS-801M

TELNET

T is an acronym for TEL

TELNE etype NETwork. It is a terminal emulation protocol that uses the Transmission

TELNET enables the client to control the server and communicate with other servers on the network. To start a

Control Protocol (TCP) and provides a virtual connection between TELNET server and TELNET client

Telnet session, the client user must log in to a server by entering a valid username and password. Then, the

client user can enter commands through the Telnet program just as if they were entering commands directly on

the server console.

ToS

ToS is an acronym for Type of Service. It is implemented as the IPv4 ToS priority control. It is fully decoded to

determine the priority from the 6-bit ToS field in the IP header. The most significant 6 bits of the ToS field are fully

bit in the

decoded into 64 possibilities, and the singular code that results is compared against the corresponding

IPv4 ToS priority control bit (0~63).

UDP

UDP is an acronym for User Datagram Protocol. It is a communications protocol that uses the Internet Protocol

(IP) to exchange the messages between computers.

UDP is an alternative to the Transmission Control Protocol (TCP) that uses the Internet Protocol (IP). Unlike TCP,

oes not provide the service of dividing a message into packet datagrams, and UDP doesn't provide

reassembling and sequencing of the packets. This means that the application program that uses UDP must be

rder. Network applications that want to

save processing time because they have very small data units to exchange may prefer UDP to TCP.

arrived intact.

UDP d

able to make sure that the entire message has arrived and is in the right o

UDP provides two services not provided by the IP layer. It provides port numbers to help distinguish different

user requests and, optionally, a checksum capability to verify that the data

Common network applications that use UDP include the Domain Name System (DNS), streaming media

applications such as IPTV, Voice over IP (VoIP), and Trivial File Transfer Protocol (TFTP).

User Priority

User Priority is a 3-bit field storing the priority level for the 802.1Q frame.

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