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多选题
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
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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
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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
applicationB
presentationC
sessionD
transportE
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RSTPD
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Blocking mode
考题
单选题In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?（）A
single ATM headerB
single Ethernet headerC
ATM header followed by a PPP headerD
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单选题The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?（）A
8B
6C
30D
32E
14F
16
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