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23. i = A, ii = C, iii = B
24. i = E, ii = A, iii = C, iv = D, v = B
25. i = B, ii = A, iii = D, iv = C
26. i = B, ii = D, iii = C, iv = A
27. Tr ue. IP phone s reclas s ify incoming frame s from the P C. Sw itche s c an accept or reclas-
sify incoming frames.
28. CGMP and IGMP snooping control multicast traffic at Layer 2. The switch and local
router exchange CGMP messages. With IGMP snooping, the switch listens to IGMP
messages between the host and the router.
29. ISL and IEEE 802.1p/Q are two methods for CoS. ISL was created by Cisco and uses
an external tag that contains 3 bits for marking. IEEE 802.1p specifies 3 bits for mark-
ing that is carried in the internal tag of IEEE 802.1q. The IEEE 802.1p specification is
not included in the IEEE 802.1D-1998 standard.
30. False. You can configure the CGMP only if both the router and switch are Cisco
devices. IGMP snooping can be configured in mixed environments.
31. The campus backbone should have high-speed links. Recommend Gigabit Ethernet
links.
32. The IP phones should remap the workstation traffic to a value less than the value
assigned to voice. Typically, it is recommended that you configure the IP phone to set
the DSCP to EF for VoIP bearer traffic.
33. Inspect them at the Layer 3 switches in Building A. Packets should be marked and
accepted as close as possible to the source.
34. No. There is no redundancy to the WAN module. A separate link to another building
would provide that redundancy.
35. No. There is no redundancy to the Internet module. A separate link from another
building would provide that redundancy.
36. Ye s . T h e n e t w o r k u s e s L a y e r 2 s w i t c h e s a t t h e b u i l d i n g - a c c e s s l a y e r a n d L a y e r 3
switches at the building distribution and campus backbone layers.
37. A, C, and E
38. C
39. B and C
40. C
41. D
42. C
43. A. Use redundant triangle topology between distribution and core layers.
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