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Q481. (Topic 2)
When the IP address of the host part of the median of n, then the network number of host addresses available ()
A. 2n-1
B. 2n-2
C. 2n-1
D. 2n
Answer: B
Q482. (Topic 2)
: 202
Tracer program is an application layer program, which uses the transport protocol is
A. ICMP
B. ARP
C. TCP
D. UDP
Answer: D
Q483. (Topic 2)
Ping uses a series of () messages to determine the communication delay and packet loss.
A. FTP
B. Tracert
C. ICMP
D. Telnet
Answer: C
Q484. (Topic 1)
: 57
Is a router for network interconnection of computer equipment, it works in the OSI reference model ().
A. Session layer
B. Data Link Layer
C. Network Layer
D. Application layer
Answer: C
Q485. (Topic 4)
Judge: ATM is connection-oriented packet-switched network, the main body in a single network to carry a variety of information media, carrying a variety of communication services, and to ensure QoS.
A. True
B. False
Answer: B
Q486. (Topic 4)
X.25 physical layer ().
A. LAPD
B. X. 21
C. H. 264
D. SDH
Answer: B
Q487. (Topic 3)
Port mirroring configuration, which of the following steps must be configured ().
A. redirect
B. acl
C. classify
D. behavior
Answer: B
Q488. (Topic 1)
: 101
Is the broadcast MAC address
A. FF-FF-FF-FF
B. FF-FF-FF-FF-FF-FF
C. 00-00-00-00-00-00
D. 00-00-00-FF-FF-FF
Answer: B
Q489. (Topic 4)
The following routing protocols, multicast routing protocol which is
A. RIP
B. PIM-DM
C. PIM-SM
D. DVMRP
Answer: B,C,D