單項(xiàng)選擇題Which is the result of enabling IP Source Guard on an untrusted switch port that does not have DHCP snooping enabled？（）

A.DHCP requests will be switched in the software， which may result in lengthy response times.
B.The switch will run out of ACL hardware resources.
C.All DHCP requests will pass through the switch untested.
D.The DHCP server reply will be dropped and the client will not be able to obtain an IP address.


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1.多項(xiàng)選擇題Which three statements are true about Source Specific Multicast？（）

A.Is best suited for applications that are in the one-to-many category.
B.SSM uses shortest path trees only.
C.The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a.
D.There are no RPs to worry about.

4.多項(xiàng)選擇題For the following LMI types，which three can be configured for use with Frame Relay on a Cisco router？（）

A.Cisco
B.ANSI - Annex D
C.Q.931 - Annex B
D.Q.933 - Annex A