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21. ISDN: The ISDN Primary Rate Interface (PRI, also known as 23B+D1) service delivers 23 B channels and one 64KBPS D channel for a total bit rate of up to 1.544 MBPS.
ISDN BRI will have 2B + 1D channels, the total bandwidth is 64X2 +16 = 144 KBPS
22. The most important design rule for 100MBPS Ethernet is that the round trip collision delay must not exceed 512 bit times, which is same as that of 10BaseT. However, a bit time in 100BaseT is 10 times smaller. Therefore, a bit time on a 100 MBPS Ethernet is 0.01 microseconds, compared to 0.1 microseconds on a 10 MBPS Ethernet. Therefore, the maximum round trip delay for a 100 MBPS Ethernet is 5.12 microseconds whereas that of 10BaseT is 51.2 microseconds.
23. Cisco switches support the following trunking protocols:
24. Class I repeaters have a latency of 0.7 microseconds and only one repeater hop is allowed.
Class II repeaters have a latency of 0.46 microseconds and one or two repeater hops are allowed.
25. Cisco Routers:
1600 series access routers: These are inexpensive, easy to use, multiprotocol routers. Cisco 1600, and 2600 series routers have optional expansion modules.
The 4000 series routers have the following features:
26. CiscoView can be integrated with several other network management platforms like HP OpenView, IBM NetView, CiscoWorks etc. to provide a better system to manage Cisco devices.
27. Route summarization reduces the route distribution and route-processing overhead in a network.
28. The HSSI interface on a Cisco router can support speeds up to 52 MBPS.
29. Catalyst switches:
30. Bandwidths (typical):
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