to perform a label push operation
to track the status of signaled LSPs
to perform longest-match route lookups
to reserve resources, such as labels and path information
第1题：
Which two characteristics apply to a CAS T1 interface?（）
第2题：
For what two purposes does the Ethernet protocol use physical addresses? （）
第3题：
A. when all equipment is manufactured by Cisco
B. when there are multiple paths to destination networks
C. because having multiple routing protocols confuses hackers
D. when migrating from an older Interior Gateway Protocol (IGP) to a new IGP
E. when using UNIX host - based routers
F. when smaller broadcast domains are desired
第4题：
Cisco IOS XR has implemented a nonstop routing feature so that when RP failover occurs， the routinginformation can be recovered locally. Which protocol does not support the NSR feature？（）
第5题：
What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network when usingthe "show ip bgp" command？（）
第6题：
What are two purposes of a forwarding class?（）
第7题：
What are three traffic descriptors that are used by the classification process to categorize packets that require special OoS handling？（）
第8题：
第9题：
What are the three models of quality of service （QoS） in a network？（）
第10题：
What two situations could require the use of multiple routing protocols? （）