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单选题
When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork?（）
A
0
B
1
C
2
D
3
E
4
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考题
When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork()。
A.0B.1C.2D.3E.4
考题
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空白（3）处应选择（）A、sourceB、routeC、destinationD、host
考题
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When you issue the logging trap informational command, what happens? （）A、An information trap is sent to the SNMP server.B、Informational and debug messages are logged to the syslog server.C、All messages are sent to the logging host, where selections are made.D、All messages from emergencies to informational are sent to the logging host.
考题
When a packet is sent from Host 1 to Server 1, in how many different frames will the packet be encapsulated as it is sent across the internetwork?（）A、0B、1C、2D、3E、4
考题
When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）A、When the discovery packet enters the router from the DHCP client.B、Only when the offer packet enters the router from the DHCP server.C、When the acknowledge packet enters the router from the DHCP server.D、Only when the discovery packet leaves the router going to the DHCP server.
考题
How does the ERX Edge Router interact with subscriber IP addresses assigned by an externa lDHCP server?（）A、It monitors messages from the external server and updates the routing table as needed.B、It maintains the leases for the DHCP server and reassigns addresses to new subscribers.C、It sends keepalives to the subscriber and makes the address available when the subscriber stops responding.D、It sends keepalives to the subscriber and removes the host route when the subscriber stops responding.
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You have a server named Server1 that runs Windows Sever 2003 Service Pack 2 （SP2）. You create a FTP site on Server1.You need identify how many users are connected to the FTP site. What should you do？（）A、From Task Manger， view the Networking tab.B、From the command prompt， run Net view //server1.C、From the properties of the FTP site， view Current Sessions.D、From the properties of the FTP site， enable Open Database Connectivity （ODBC） logging.
考题
单选题When you issue the logging trap informational command, what happens? （）A
An information trap is sent to the SNMP server.B
Informational and debug messages are logged to the syslog server.C
All messages are sent to the logging host, where selections are made.D
All messages from emergencies to informational are sent to the logging host.
考题
多选题Which two statements describe the behavior of the server's SQL mode?（）AThe server's SQL mode determines how the server should behave when performing data validation check and interpreting different forms of syntaxBThe server's SQL mode determines whether the server should be read-only or should accept commands such as INSERT and UPDATECThe server's SQL mode can be changed at the session level with a SET SESSION sql_mode=new_value commandDThe server's SQL mode, when globally set on a slave server, applies to events sent from the master
考题
单选题An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白（1）处应选择（）A
modemsB
routersC
switcherD
computers
考题
单选题For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to.
空白（1）处应选择（）A
connectionlessB
connection-orientedC
datagramD
telegram
考题
单选题For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to.
空白（3）处应选择（）A
sourceB
routeC
destinationD
host
考题
单选题R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。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
考题
单选题How does the ERX Edge Router interact with subscriber IP addresses assigned by an external DHCP server?（）A
It monitors messages from the external server and updates the routing table as needed.B
It maintains the leases for the DHCP server and reassigns addresses to new subscribers.C
It sends keep alives to the subscriber and makes the address available when the subscriber stops responding.D
It sends keep alives to the subscriber and removes the host route when the subscriber stops responding.
考题
单选题An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?
空白（4）处应选择（）A
destinationB
resourceC
packetD
source
考题
单选题When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）A
When the discovery packet enters the router from the DHCP client.B
Only when the offer packet enters the router from the DHCP server.C
When the acknowledge packet enters the router from the DHCP server.D
Only when the discovery packet leaves the router going to the DHCP server.
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