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单选题 A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?

A、 application
B、 presentation
C、 session
D、 transport
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gongyifu
2020-06-18
共171道

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单选题 The network administrator is asked to configure 113 point-to-point links.Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?

A、10.10.0.0/18 subnetted with mask 255.255.255.252
B、10.10.0.0/25 subnetted with mask 255.255.255.252
C、10.10.0.0/24 subnetted with mask 255.255.255.252
D、10.10.0.0/23 subnetted with mask 255.255.255.252

单选题 Refer to the exhibit. What is the most appropriate summarization for these routes?
QQ图片20171108202437

A、10.0.0.0 /21
B、10.0.0.0 /22
C、10.0.0.0 /23
D、10.0.0.0 /24

单选题 Why will a switch never learn a broadcast address?

A、 Broadcast frames are never sent to swiches.
B、 Broadcast addresses use an incorrect format for the switching table.
C、 A broadcast address will never be the source address of a frame.
D、 Broadcasts only use network layer addressing.

单选题 What will happen if a private IP address is assigned to a public interface connected to an ISP?

A、 Addresses in a private range will be not routed on the Internet backbone.
B、 Only the ISP router will have the capability to access the public network.
C、 The NAT process will be used to translate this address in a valid IP address.
D、 Several automated methods will be necessary on the private network.
E、 A conflict of IP addresses happens, because other public routers can use the same range.

单选题 Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?

A、 Frame Relay
B、 HDLC
C、 x.25
D、 PPP

单选题 Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network address?

A、 172.16.16.0
B、 172.16.24.0
C、 172.16.0.0
D、 172.16.28.0

单选题 How does a DHCP server dynamically assign IP addresses to hosts?

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

单选题 Refer to the exhibit, Host A pings interface S0/0 on router 3, what is the TTL value for that ping?

QQ图片20171108202443

A、

253

B、

252

C、

255

D、

254