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The OSI reference model divides networking activity into how many layers?
seven
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The addition of information to a PDU as it’s passed from one layer to the next is called which of the following?
encapsulation
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Layers that act as though they communicate directly with each other across the network are called which of the following?
peers
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Write the corresponding number for each of the following OSI layers (for example, 7 is the top layer, and 1 is the bottom layer).
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The _________________ layer handles the creation of frames.
Data Link
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Which layer handles flow control, data segmentation, and error recovery?
Transport
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The ________________ layer governs how a NIC must be attached to the network medium.
Physical
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Which layer determines the route a packet takes from sender to receiver?
Network
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The ______________ layer handles converting data from platform-specific application formats to a generic, network-ready representation (and vice versa).
Presentation
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Which layer is responsible for setting up, maintaining, and ending ongoing information exchanges across a network?
c. Session
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The ______________ layer handles segmentation of large amounts of data for transmission and reassembly of segmented data on receipt.
Transport
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Which of the following elements might occur within a frame? (Choose all that apply.)
- a. physical addresses
- c. data
- d. CRC
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CRC is an acronym for which of the following?
b. Cyclical Redundancy Check
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How many times is a CRC calculated?
c. twice; once before transmission and again on receipt
-
Of the following Project 802 specifications, which belongs at the LLC sublayer?
b. 802.2
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Which layer of the OSI reference model does Project 802 divide into two sublayers
b. Data Link
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What are the names of the two sublayers specified as part of Project 802? (Choose two answers.)
- b. Logical Link Control (LLC)
- d. Media Access Control (MAC)
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Which term refers to stripping header information as a PDU is passed from one layer to a higher layer?
a. decapsulation
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Which IEEE 802 standard applies to Ethernet?
b. 802.3
-
Which IEEE 802 standard applies to token ring?
d. 802.5
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Which IEEE 802 standard applies wireless PANs?
d. 802.15
-
Which IEEE 802 standard applies to wireless LANs?
e. 802.11
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What is the name of the PDU at the Transport layer?
c. segment
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Which of the following definitions best describes a redirector?
c. a software service that handles resource requests, passes on local requests for local service, and redirects network access requests to the correct network server or service
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Which of the following is an example of software found at the Application layer? Choose all that apply.)
-
At which Data Link sublayer does the network address burned into every NIC reside?
a. Media Access Control (MAC)
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Which of the following problems can occur at the Physical layer? (Choose all that apply.)
c. signal errors caused by noise
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