多項選擇題Which two tasks does the Dynamic Host Configuration Protocol perform?（）

A.Set the IP gateway to be used by the network.
B.Perform host discovery used DHCPDISCOVER message.
C.Configure IP address parameters from DHCP server to a host.
D.Provide an easy management of layer 3 devices.
E.Monitor IP performance using the DHCP server.
F.Assign and renew IP address from the default pool.


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1.多項選擇題What are two characteristics of Telnet (Choose two.)（）。

A.Itsendsdataincleartextformat.
B.ItisnolongersupportedonCisconetworkdevices.
C.ItismoresecurethanSSH
D.Itrequiresanenterpriselicenseinordertobeimplemented.
E.ItrequiresthatthedestinationdevicebeconfiguredtosupportTelnetconnections.

3.單項選擇題What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?（）

A.6，9，12，18
B.1，2，5.5，6
C.5.5，6，9，11
D.1，2，5.5，11

4.單項選擇題Which port state is introduced by Rapid-PVST?（）

A.learning
B.listening
C.discarding
D.forwarding

5.單項選擇題

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？（）

A.ermit all packets matching the first three octets of the source address to all destinations
B.permit all packet matching the last octet of the destination address and accept all source addresses
C.permit all packet matching the host bits in the source address to all destinations
D.permit all packet from the third subnet of the network address to all destinations