决定教育事业发展的直接和最终的因素是()。
A.政治经济制度的发展水平
B.教育投资
C.领导者的意志
D.生产力的发展水平
E.文化发展水平
第1题
A.session
B.network
C.physical
D.datalink
E.transport
第2题
A.TTL
B. flags
C. checksum
D. type
第4题
A. IP address
B. destination MAC address
C. ARP table entry
D. FCS checksum
第5题
A. The frame is dropped.
B. The frame is addressed with a broadcast MAC address and sent out all ports.
C. The frame is sent out all ports except the receiving port.
D. An ARP request is sent out all ports except the receiving port.
E. A destination unreachable message is sent back to the source address.
F. None of the above.
第6题
A.The frame does not have MAC addresses.
B.The source MAC address in the frame is the MAC address of the NIC of Host 1.
C.The source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.
D.The destination MAC address in the frame is the MAC address of the NICof server 1.
E.The destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2
第7题
A. Drop the data.
B. Send the data frames to the default gateway.
C. Create an ARP request to get a MAC address for the receiving host.
D. Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.
第8题
A receiving host has failed to receive all of the segments that it should acknowledge.
What can the host do to improve the reliability of this communication session?
A.Start a new session using UDP
B.Obtain a new IP address from the DHCP server
C.Use a different source port for the session
D.Decrease the sequence number
E.Decrease the window size
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