單項(xiàng)選擇題An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC. If a reply is received, what does this confirm?()

A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured.
D.The PC has connectivity up to Layer 5 of the OSI model.
E.The PC has the TCP/IP protocol stack correctly installed.


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1.單項(xiàng)選擇題What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5?()

A.It creates a global address pool for all outside NAT transactions.
B.It establishes a dynamic address pool for an inside static address.
C.It creates dynamic source translations for all inside local PAT transactions.
D.It creates a one-to-one mapping between an inside local address and an inside global address.
E.It maps one inside source address to a range of outside global addresses.

2.多項(xiàng)選擇題What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)()

A.VLAN support
B.compression
C.authentication
D.sliding windows
E.multilink support
F.quality of service

3.多項(xiàng)選擇題Which two statements best describe the wireless security standard that is defined by WPA? (Choose two.)()

A.It specifies use of a static encryption key that must be changed frequently to enhance security.
B.It requires use of an open authentication method.
C.It specifies the use of dynamic encryption keys that change each time a client establishes a connection.
D.It requires that all access points and wireless devices use the same encryption key.
E.It includes authentication by PSK

4.單項(xiàng)選擇題How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?()

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface.
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
C.Configure many sub-interfaces on the same subnet.
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces.

5.單項(xiàng)選擇題What should be part of a comprehensive network security plan?()

A.Allow users to develop their own approach to network security.
B.Physically secure network equipment from potential access by unauthorized individuals.
C.Encourage users to use personal information in their passwords to minimize the likelihood of passwords beingforgotten.
D.Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported.
E.Minimize network overhead by deactivating automatic antivirus client updates.

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