Which statement describes a characteristic of the frame header fields of the data link layer?
answer
They vary depending on protocols.
question
Which two statements are true of the deterministic access method?
answer
1. Devices take turns transmitting
2. The throughput is predictable.
question
What is the purpose of the physical link control field in a data link layer header?
answer
To establish the media link
question
Which is a function of the Logical Link Control (LLC) sublayer?
answer
to identify which network layer protocol is being used
question
Fill in the blank.
In fiber optic media, the signals are represented as patterns of _________.
answer
Light
question
When is a wired connection preferred to a wireless connection by an end-user device?
answer
when the end-user device will run an application that requires a dedicated connection to the network
question
An administrator measured the transfer of usable data across a 100 Mb/s physical channel over a given period of time and obtained 60 Mb/s. Which kind of measurement did the administrator obtain?
answer
goodput
question
Which two factors influence the method that is used for media access control? (Choose two.)
answer
1. how the connection between nodes appears to the data link layer
2. how nodes share the media
question
What is a characteristic of a WAN hub-and-spoke topology?
answer
The branch sites are connected to a central site through point-to-point links.
question
Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)
answer
ISO, ITU
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