單項選擇題Which command enables RSTP on aswitch?（）

A.spanning-tree mode rapid-pvst
B.spanning-tree uplinkfast
C.spanning-tree backbonefast
D.spanning-tree mode mst


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1.多項選擇題Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0？（）

A.113.10.4.0
B.186.54.3.0
C.175.33.3.255
D.26.35.2.255
E.17.35.36.0

2.單項選擇題When two hosts are trying to communicate across a network, how does the host originating thecommunication determine the hardware address of the host that it wants to "talk" to?（）

A.RARP request
B.Show Network Address request
C.Proxy ARP request
D.ARP request
E.Show Hardware Address request

3.單項選擇題Which network protocol does DNS use?（）

A.FTP
B.TFTP
C.TCP
D.UDP
E.SCP

4.單項選擇題DNS servers provide what service?（）

A.they run a spell check on host names to ensure accurate routing
B.they map individual hosts to their specific IP address
C.they convert domain names into IP address
D.Given an IP address,they determine the name of the host that is…

5.單項選擇題Which statement describes the process of dynamically assigning IP addresses by the DHCP server?（）

A.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B.Addresses are permanently assigned so that the hosts uses the same address at all times.
C.Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
D.Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.

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