WhichroamingoptionwillkeepthemonthesameIPsubnetwhenclie……

单项选择题Sun Stable is a global insurance company with headquarters located in Houston， Texas. Thecampus there is made up of a number of office buildings located within the same vicinity. In 2003，a new building. Building 331B was added. The additional building houses approximately 1000 employees. Ratherthan deploy a private branch exchange （PBX） in the new building， Sun Stable has decided toimplement an IP telephony solution. External calls will be carried across a MAN link to anotherbuilding， where a gateway connects into the worldwide PBX network of Sun Stable. Voice mail andunified messaging components are required and all IP phones and workstations should be on separate VLANs and IP subnets. ActualTests.comWhich IP telephony deployment best suits their need？（）

A. single-site
B. multisite with centralized call processing
C. multisite with distributed call processing
D. clustering over the WAN

单项选择题WhichIOSQoSenhancementwascreatedtoaddressscalabilityandbandwidthguaranteeissues？（）

A. DiffServ
B. IntServ
C. RSVP
D. WFQ

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