单项选择题

Which IOS QoS enhancement was created to address scalability and bandwidth guaranteeissues？（）

A. DiffServ
B. IntServ
C. RSVP
D. WFQ

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多项选择题

Which two of these are characteristics of multicast routing？（）

A. multicast routing uses RPF
B. multicast routing is connectionless.
C. In multicast routing， the source of a packet is known.
D. When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath
E. Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destination

多项选择题

Which two of the following Cisco router platforms support Multicast Distributed Fast Switching？（）

A. 3600 series
B. 7200 series with NSE-1
C. 7500 series
D. 12000 series

单项选择题

Which routing protocol best fits these requirements？（）
- Supported by multiple router vendors
- Requires minimum router CPU and memory resources
- Uses a simple routing metric
- Supports manual or automatic route summarization

A. EIGRP
B. OSPF
C. IS-IS
D. RIPv2