680 Appendix A: Answers to Review Questions
20
What special support was added for legacy secondary logical units that cannot issue a
BIND?
Dependent Logical Unit Requester (DLUR).
21
APPN is used for what purpose?
To allow sessions to be established between end users without the involvement of the
mainframe.
22
Name two benefits of DLSw+.
It minimizes the number of concurrent peer connections.
Dynamic on-demand peer relationships.
23
With DLSw+, the RIF terminates where?
In the virtual ring.
24
Name two reasons to use SDLLC.
To conserve FEP ports.
To connect remote SDLC controllers.
25
Name two reasons to use local acknowledgment with STUN.
Prevents session loss over periodically congested WAN.
Improves performance, because routers accept the full SDLC window without delay.
26
Name two reasons to integrate the mainframe into the data center.
Facilitates the mainframe as a high-speed file server.
Supports new business applications.
27
Which encapsulation method provides for local acknowledgment?
TCP.
28
Why is load balancing not recommended with FST encapsulation?
Because packets might arrive out of order.
29
Promiscuous mode means the peer will accept connections from whom?
Any other peer.
30
If you have only one Token Ring path to a destination, what type of RIF cache could you
use?
A static RIF cache.
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