Filter
Top Products
Important Information
EN/LZT 108 6377 R4 - September 2003
95
broadband medium, such as a single DSL line, wireless device or cable
modem. All the users over the Ethernet share a common connection, so the
Ethernet principles supporting multiple users in a LAN combine with the
principles of PPP, which apply to serial connections.
PVC
Short for Permanent Virtual Circuit, which is a logical point-to-point circuit
between customer sites. PVCs are low-delay circuits because routing
decisions do not need to be made along the way. Permanent means that
the circuit is preprogrammed by the carrier as a path through the network. It
does not need to be set up or disconnected for each session.
- R -
RFC
Short for Request For Comments, a series of notes about the Internet,
started in 1969 (when the Internet was the ARPANET). An Internet
Document can be submitted to the IETF by anyone, but the IETF decides if
the document becomes an RFC. Eventually, if it gains enough interest, it
may evolve into an Internet standard. Each RFC is designated by an RFC
number. Once published, an RFC never changes. Modifications to an
original RFC are assigned a new RFC number.
RIP
Short for Routing Information Protocol, which is a protocol that specifies
how routers exchange routing table information. With RIP, routers
periodically exchange entire tables.
Router
A device that connects any number of LANs. Routers use headers and a
forwarding table to determine where packets go, and they use ICMP to
communicate with each other and configure the best route between any
two hosts. Very little filtering of data is done through routers. Routers do not
care about the type of data they handle.
- S -
SMTP
Short for Simple Mail Transfer Protocol, a protocol for sending e-mail
messages between servers. Most e-mail systems that send mail over the
Internet use SMTP to send messages from one server to another.
SSID
Short for Service Set Identifier, a 32-character unique identifier attached to
the header of packets sent over a WLAN that acts as a password when a
mobile device tries to connect to the BSS (Basic Service Set). The SSID
differentiates one WLAN from another; so all access points and all devices
attempting to connect to a specific WLAN must use the same SSID. A