A.PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree.
B.Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.
C.PIM join messages are only sent when the multicast distribution tree is first being established.
D.PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.
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A.The source must send a PIM Register message to the rendezvous point （RP）
B.The source must first join the multicast group using IGMP before sending
C.The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the PIM designated router （DR）
D.No control plane signaling needs to be performed；the source can simply begin sending on the local subnet
A.Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transport data.
B.Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP to transport packets.
C.There is no way to make BGP work across a firewall without special configuration， so there is no simple test that will show you if BGP will work or not， other than trying to start the peering session.
D.There is no way to make BGP work across a firewall.
A.Port 3/12 was already up and forwarding before the loop was created.
B.Port priority is based on lowest priority and lowest port number.
C.You connected the wire on port 3/18 last.
D.None of the above， it is purely random.
Refer to the exhibit. This exhibit shows the NAT configuration for Router A and the output for a ping issued from device 171.68.200.48 and destined to 172.16.47.142. Based on this information, what change must be made to Router A in order for the ping to work?（） 
A.reload the router
B.clear the route cache
C.add a static route
D.configure IP as classless
E.load a newer IOS image
最新試題
How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）
Refer to the exhibit.Which statement describes DLCI 17?（）
As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）
hsrp speak狀態(tài)是什么意思？
A default Frame Relay WAN is classified as what type of physical network?（）
什么是NAT？
When upgrading the IOS image,the network administrator receives the exhibited error message.What could be the cause of this error?（）
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?（）
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2.The routers cannot establish an adjacency relationship on their common Ethernet link.The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2.Based on the information in the graphic,what is the cause of this problem?（）
當(dāng)將多個(gè)交換機(jī)加入到MST region當(dāng)中會發(fā)生什么（what happen）？