Network Router User Manual

RFC
Request for Comments. The document (begun in 1969) is for describing the Internet suite
of protocols and related experiments. Not all RFCs describe Internet standards, but all
Internet standards are written up as RFCs.
RFC 1483
Multi-protocol encapsulation over AAL-5. Two encapsulation methods for carrying network
interconnect traffic over ATM AAL-5. The first method allows multiplexing of multiple
protocols over a single ATM virtual circuit. The protocol of a carried PDU is identified by
prefixing the PDU by an IEEE 802.2 Logical Link Control (LLC) header. This method is in
the following called "LLC Encapsulation". The second method does higher-layer protocol
multiplexing implicitly by ATM Virtual Circuits (VCs). It is in the following called "VC Based
Multiplexing".
Router
A system responsible for making decisions about which of several paths network (or
Internet) traffic will follow. To do this, it uses a routing protocol to gain information about
the network and algorithms to choose the best route based on several criteria known as
"routing metrics.
Subnet Mask
A subnet mask, which may be a part of the TCP/IP information provided by your ISP, is a
set of four numbers (e.g. 255.255.255.0) configured like an IP address. It is used to create
IP address numbers used only within a particular network (as opposed to valid IP address
numbers recognized by the Internet, which must be assigned by InterNIC).
TCP/IP, UDP
Transmission Control Protocol/Internet Protocol (TCP/IP) and Unreliable Datagram
Protocol (UDP). TCP/IP is the standard protocol for data transmission over the Internet.
Both TCP and UDP are transport layer protocol. TCP performs proper error detection and
error recovery, and thus is reliable. UDP on the other hand is not reliable. They both run
on top of the IP (Internet Protocol), a network layer protocol.
TELNET
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