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Network Fundamentals

Lesson Seven - MTA Exam 98-366

TermDefinition
basic rate ISDN Digital technology that supports two 64 Kbps data links and one 16Kbps D channel for timing.
Border Gateway Protocol (BGP) A core routing protocol that bases routing decisions on the network path and rules.
broadband cable Technology used for cable Internet and cable TV. It operates at a higher speed than DSL.
Committed information rate (CIR) A term that describes a certain amount of information over time that you have committed to have available.
CSU/DSU A high-speed digital data interchange device.
digital subscriber line (DSL) A family of technologies that provides data transmissions over local telephone networks.
dynamic routing Uses protocols that automatically update routing tables between routers.
fiber distributed data interface (FDDI) A standard for transmitting data on optical fiber cables at a rate of around 100 Mbps. It uses the ring topology.
Frame Relay A form of packet switching newer than X.25 and is designed for faster connections.
header Information found at the beginning of the packet that includes items such as the packet flag, HDLC (high-level data link control), the from address, information with error detection, and so on.
Integrated Services Digital Network (ISDN) A digital technology developed to combat the limitations of PSTN. Users that have ISDN can send data, fax, or talk on the phone, all simultaneously from one line.
Interior Gateway Routing Protocol (IGRP) A proprietary protocol used in large networks to overcome the limitations of RIP.
leased lines Lines or circuits that you pay a monthly fee to use.
Open Shortest Path First (OSPF) A link-state protocol that monitors the network for routers that have a change in their link state, meaning they were turned off, turned on, or restarted. This is perhaps the most commonly used interior gateway protocol in large networks.
Overhead The packet’s header and trailer information combined.
packet switching Technology that breaks down data into smaller packets and sent independently to its destination. When they arrive at their destination, they are put in the correct order and reassembled.
packet switching exchange (PSE) Large mega switching computers that are located in the central offices just inside the cloud that handle huge numbers of packets and decide which circuit (out of tens of thousands) each packet will take
permanent virtual circuit (PVC) A virtual circuit that is always connected to a cloud.
POTS/PSTN Stands for plain old telephone system/public switched telephone network. This is what we use now for “regular” phone lines and it has been around since the 1940s.
primary rate ISDN Digital technology that runs 1.536 Mbps and runs on a T1 circuit. PRI has 23 equal 64 Kbps B channels for data, along with one 64 Kbps D channel for timing.
Routing Information Protocol (RIP) A dynamic protocol that uses distance-vector routing algorithms to decipher which route to send data packets.
SONET Technology that transfers multiple digital bit streams over optical fibers.
static routing The manual configuration of a router.
synchronous A method that uses a clocking circuit that controls the timing of communications between the different routers.
T1 A truck carrier circuit that runs at 1.544 Mbps.
T3 A truck carrier circuit that runs at 44.736 Mbps.
T-carrier A cabling and interface system designed to carry data at high speeds.
Trailer Information found at the end of a packet that includes items such as the cyclic redundancy check (CRC), which checks the size of the packet for accuracy at the destination computer.
virtual circuit Technology that may use one or more physical circuit that resembles a single dedicated circuit.
X.25 One of the first implementations of packet switching.
Created by: ctrader
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