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

多项选择题Whichtwoofthesearecharacteristicsofmulticastrouting？（）

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WhichtwoofthefollowingCiscorouterplatformssupportMulticastDistributedFast 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

单项选择题Whatisacriteriaoftheenterprisecompositenetworkmodel？（）

A. includes all modules needed to meet any network design
B. defines flexible boundaries between modules for scalability requirements
C. clearly defines module boundaries and demarcation points to identify where traffic is
D. requires specific core， distribution， and access layer requirements to match the model

单项选择题WhatisthefirststepthatyouwoulduseCiscoProductAdvisorforwhenselectingarouterforan Edgesolution？（）

A. determine types of protocols to be supported
B. determine the environment in which the router will be used
C. select the number of WAN ports required
D. select the number of LAN ports required