三臺路由器，問：在路由器B（即中間的那臺路由器）上的E0/1的IN方向做一個ACL，要求路由器A可以TELNET路由器C，但是路由器C不可以TELNET路由器A。要求寫出ACL命令行。
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A.ping 192.168.1.255
B.ping with sweep option
C.ping 192.168.1.127
D.ping 192.168.1.64
E.ping with broadcast option
A.OSPF standard hellos
B.Cisco Discovery Protocol link detection
C.Bidirectional Forwarding Detection
D.Fast Link Pulse
E.autonegotiation
Refer to the exhibit. R2 and R3 are routers connected using Ethernet services from a service provider and can receive pings from each other. OSPF is configured as the routing protocol but adjacency is not happening. According to the output of the show commands in the exhibit, what could be the most likely cause of the problem?（）
A.Ethernet interfaces were configured as point-to-point.
B.Process IDs are not matching.
C.Configured bandwidths do not match on both interfaces.
D.Broadcasts and multicast are not being propagated over the Ethernet services.
E.OSPF cost does not match on both interfaces.
最新試題
The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）
How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）
問一個怎么樣的屬性，能讓路由不通告給任何的peer？
Which of the following describes the roles of devices in a WAN?（）
hsrp speak狀態(tài)是什么意思？
what is the disadvantage of policing？
什么是NAT？
DHCP SERVER在給一個網(wǎng)段設(shè)置POOL時，該網(wǎng)段路由器接口地址能不能放入POOL，能why，不能why。
Refer to the exhibit.The network administrator is in acampus building distant from Building B.WANRouter is hosting a newly installed WAN link on interface S0/0.The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface.How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?（）
Local Preference？