多项选择题
What information does a router running a link-state protocol use to build and maintain its topological database?（）
A. hello packets
B. SAP messages sent by other routers
C. LSAs from other routers
D. beacons received on point-to-point links
E. routing tables received from other link-state routers
F. TTL packets from designated routers
点击查看答案
相关考题
-
多项选择题
OSPF routing uses the concept of areas. What are the characteristics of OSPF areas?（）
A. Each OSPF area requires a loopback interface to be configured.
B. Areas may be assigned any number from 0 to 65535.
C. Area 0 is called the backbone area.
D. Hierarchical OSPF networks do not require multiple areas.
E. Multiple OSPF areas must connect to area 0.
F. Single area OSPF networks must be configured in area 1. -
多项选择题
Which are valid modes for a switch port used as a VLAN trunk?（）
A.transparent
B.auto
C.on
D.desirable
E.blocking
F.forwarding -
多项选择题
An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL?（）
A.FTP
B.Telnet
C.SMTP
D.DNS
E.HTTP
F.POP3
