Unit 1 & Unit 2 Flashcards
Unit 1 - Introduction to Communication & Networks and Unit 2 - The Physical Layer
A set of entries in the forwarding tables that cause some packets to circulate endlessly.
Routing Loops
The rate at which bits are transmitted.
Data Rate
Refers to the overall effective transmission rate, taking into account things like transmission overhead, protocol inefficiencies and perhaps even competing traffic. It is generally measured at a higher network layer than the data rate.
Throughput
This term can be used to refer to either data rate or throughput.
Bandwidth
Sometimes used to refer to what might also be called “application-layer throughput”: the amount of usable data delivered to the receiving application
Goodput
Define a packet
Modest-sized buffers of data, transmitted as a unit through some shared set of links.
Packets need to be prefixed with a “ “ which contains delivery information.
header
At the transport layer, packets are referred to as “ “
segments
AT the LAN layer, packets are referred to as “ “
frames
A repeater with more than two ports was commonly called a “ “?
hub
In the telecom world, a repeater might be called a “ “.
Hint: 2 words, one rhymes with refrigerator
digital regenerator
It was the rise of hubs that enabled “ “ in which each host connects directly to the hub rather than to one long run of coax.
Hint: 2 words.
Star topologies
Hubs propagate “ “; switches do not.
collisions
Checksum is added by “ “, NEVER by host software
Ethernet hardware
