單項(xiàng)選擇題Which of the following protocols uses both TCP and UDP ports?()

A.SMTP
B.Telnet
C.FTP
D.DNS


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2.多項(xiàng)選擇題Which two statements are characteristics of a distance vector routing protocol?()

A.RIP is an example of distance vector routing protocols
B.Updates are periodic and include the entire routing table
C.Routing updates are sent only after topology changes
D.The protocol can be useful in hub-and-spoke and hierarchical networks
E.Convergence is usually faster than with link state protocols
F.Each router has its own view of the topology

3.多項(xiàng)選擇題What are three valid reasons to assign ports to VLANs on a switch?()

A.to make VTP easier to implement
B.to isolate broadcast traffic
C.to increase the size of the collision domain
D.to allow more devices to connect to the network
E.to logically group hosts according to function
F.to increase network security

5.單項(xiàng)選擇題Which command enhances the 802.1D convergence time on ports that are connected to hosts?()

A.spanning-tree backbonefast
B.spanning-tree uplinkfast
C.spanning-tree portfast
D.spanning-tree cost512

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