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18 Cards in this Set

  • Front
  • Back
What size does a packet have to be to be considered a runt?
less than 64 bytes
What size does a packet have to be to be considered a giant?
more than 1518 bytes
What is fragment-free switching also known as?
modified cut-through
What are higher-end Cisco LAN switches known as? Why?
multilayer switches- they operate at Layer 3 and sometimes above
What switching method do higher-end Cisco LAN switches use by default?
What do Cisco switches use to determine whether to switch between store-and-forward and cut-through switching?
a user-defined error threshold
What switching method has the most latency?
What switching method has the least latency?
Is latency for cut-through switching consistent?
yes- only a set amount of data is read before forwarding
Is latency for store-and-forward switching consistent?
no- the entire packet (which may vary in size) must be read before forwarding
What are the two types of switches?
cut-through and store-and-forward
How does a cut-through switch operate?
it forwards packets as soon as the destination address is read
What type of switch is faster?
What layer do switches work at?
Layer 2
What are the 2 types of cut-through switching?
fast-forward and fragment-free
What are the advantages and disadvantages of fast-forward cut-through switching?
has the lowest level of latency, but does not check for errors and is not good for networks with high collision rates
How does fragment-free cut-through switching work?
it filters out collision fragments, then forwards the packets
What size are collision fragments?
less than 64 bytes