Chapter 12 677
11
A PU finds the gateway by using what type of frame?
All-routes explorer frame.
12
Which SNA communications protocol was designed to run over Token Ring?
LLC2.
13
What are the three SDLC frame types?
Unnumbered, information, supervisory.
14
Name the two types of SDLC link stations.
Primary and secondary.
15
Name the two types of secondary link state operation.
Two-way simultaneous, two-way alternate.
16
Name the two communication protocols in an SNA network.
SDLC, LLC2.
17
What are boundary nodes?
The boundary device is the last subarea node (FEP) where the node type 2 (cluster
controller) is attached.
18
Where are FID2 frames used?
Between the FEP and PU 2s.
19
Where are FID4 frames used?
Between FEPs or PU 4 to PU 4.
20
What is one advantage of the DSPU feature of a Cisco router?
You can insert and remove downstream PUs from the network without making any
changes on the host.
21
Which type of frames do two LLC2 stations use to communicate with each other?
XID frames.
22
What are channels?
Channels connect FEPs to mainframes.
23
Name the two types of physical connectors for FEPs.
Copper, bus and tag fiber, ESCON.
24
The ability of end stations to initiate communication without permission is called what?
Asynchronous balanced mode.
87200333.book Page 677 Wednesday, August 22, 2001 1:41 PM