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Explanation: In a switched environment, packets are switched only between ports designated to be within the same “broadcast domain”. VLANs perform network portioning and traffic separation at Layer 2. So, inter- VLAN communication cannot occur without a Layer 3 device such as a router, because network layer (Layer 3) devices are responsible for communicating between multiple broadcast domains. Note that, at Layer 2, an interface uses ISL to communicate with a switch.
Incorrect Answers:
A is incorrect; the router requires ISL.
C is incorrect; the router does not change the security settings.
D is incorrect; the router will not route a nonroutable protocol into the VLAN.
E is incorrect; without a router
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages
Q. 64
What are four ways that Fast Ethernet compares to 10BaseT Ethernet? (Choose four.)
A.Fast Ethernet uses the Same Maximum Transmission Unit (MTU).
B.Fast Ethernet is based on an extension to the IEEE 802.3 specification.
C.Fast Ethernet uses the same Media Access control (MAC mechanisms).
D.Fast Ethernet preserves the frame format that is used by 10BaseT Ethernet.
E.Fast Ethernet offers a speed increase one hundred times that of the 10BaseT Ethernet.
Answer: A, B, C, and D.
Explanation: Fast Ethernet shares a great deal of similarities with 10BaseT Ethernet. These similarities are the same MTU, same MAC mechanism and frame format. Fast Ethernet is based on IEE 820.3u, which is an extension to IEE 820.3.
Incorrect Answers:
E is incorrect; its speed 10 times faster, not 100 times.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages
Q. 65
Which configuration mode and command combination sets the bandwidth metric of a Frame Relay connection?
A.router(Config)# clock rate 56
B.
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