highest router ID first， then highest priority
highest MAC address first， then highest priority
highest router ID first， then highest MAC address
highest priority first， then highest router ID
highest priority first， then highest MAC address
第1题：
A. 3 seconds for DIS; 9 seconds for non-DIS
B. 9 seconds for DIS; 3 seconds for non-DIS
C. 10 seconds for DIS; 3 seconds for non-DIS
D. 10 seconds for all routers
第2题：
Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （）
A. supports VLSM
B. link - state routing protocol
C. operati on is similar to BGP
D. supports two routing levels within an autonomous system
第3题：
A.最大MAC地址表示最高优先权
B.最大MAC地址表示最低优先权
C.最小MAC地址表示最高优先权
D.最小MAC地址表示最低优先权
第4题：
在优先权相同的情况下选举Designated Intermediate System（DIS），则（）。
第5题：
Which OSPF network type is ideal for partially meshed NBMA networks because it is easy to configure（requires no configuration of neighbor commands）， consumes only one IP subnet， and requires no designated router election？
第6题：
A. support for designated intermediate systems and backup designated intermediate systems
B. support for multip le areas per router
C. support for classless routing
D. support for address summarization between areas
E. support for both DIS adjacencies and neighbor adjacencies
第7题：
IS - IS is often considered an alternative to OSPF in the IP world. Which two statements identify similarities between IS -IS and OSPF?（）
第8题：
There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A‘s DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80.Which statement is true?（）
A. Router A remains the DIS and generates a new pseudonode LSP for that LAN
B. Router A remains the DIS and NO new pseudonode LSP is generated for that LAN
C. Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router A
D. Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
第9题：
在IS-IS中，DIS以组播地址周期性的发送CSNP报文给区域内的所有邻居。
第10题：
Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （）