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单选题
The ping loopback hangs with no output.Which of the following is the most likely cause?（）
A
The loopback interface is down and resolv.conf is configured.
B
The loopback is not in /etc/hosts and resolv.conf is configured.
C
The loopback interface is down and resolv.conf is not configured.
D
The loopback is not in /etc/hosts and resolv.conf is not configured.
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更多 “单选题The ping loopback hangs with no output.Which of the following is the most likely cause?（）A The loopback interface is down and resolv.conf is configured.B The loopback is not in /etc/hosts and resolv.conf is configured.C The loopback interface is down and resolv.conf is not configured.D The loopback is not in /etc/hosts and resolv.conf is not configured.” 相关考题
考题
In JUNOS software, which statement is true regarding the OSPF advertisement of the loopback IP address on the ABR?()
A. When Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised.B. When Area 0 is active, the loopback address is automatically advertised into other areas.C. When Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised.D. When Area 0 is active, the router-id must be configured for the loopback address to be advertised.
考题
How is a loopback cleared on interface ge－0／0／0?()
A.Issue the operational command clear interfaces ge-0/0/0 loopback local.B.No command is necessary, the loopback times-out in 5 minutes.C.Issue the configuration command clear interfaces ge-0/0/0 loopback, then commit.D.Issue the configuration command delete interfaces ge-0/0/0 gigether-options loopback , then commit.
考题
Which of the following wiring standards would MOST likely be used to interconnect two devices without the use of a hub or switch?()
A.568AB.568BC.CrossoverD.Loopback
考题
The ping loopback hangs with no output.Which of the following is the most likely cause?()
A.The loopback interface is down and resolv.conf is configured.B.The loopback is not in /etc/hosts and resolv.conf is configured.C.The loopback interface is down and resolv.conf is not configured.D.The loopback is not in /etc/hosts and resolv.conf is not configured.
考题
The following configuration exists on a router on one end of an IPv6 tunnel. Although the configuration added so far is correct, the configuration is incomplete. Which type of tunnel is most likely to be intended by the network engineer？（）interface loopback 1ip address 192.168.1.1 255.255.255.255interface tunnel 2ipv6 address 2002:C0A8:10 1::1/64tunnel source loopback 1A. Automatic 6to4B. Manually configured tunnelC. ISATAPD. GRE
考题
On the assumption that every OSPF router in a particular area is configured with there is no loopback interface set?()
A. The IP address of the first Fast Ethernet interface.B. The IP address of the console management interface.C. The highest IP address among its active interfaces.D. The lowest IP address among its active interfaces.E. There will be no router ID until a loopback interface is configured.
考题
下面关于loopback地址的说法，正确的是（）A、loopback又称管理地址，每个设备只有1个loopback地址；B、当设备的某个接口为down，则loopback也会相应的down；C、Loopback地址是逻辑地址，与物理接口的状态无关；D、以上都不对。
考题
Based on the following items， which two types of interfaces are found on all network-based IPS sensors？（）A、Loopback interfaceB、Command and control interfaceC、Monitoring interfaceD、Management interface
考题
How is a loopback cleared on interface ge-0/0/0?（）A、Issue the operational command clear interfaces ge-0/0/0 loopback local.B、No command is necessary, the loopback times-out in 5 minutes.C、Issue the configuration command clear interfaces ge-0/0/0 loopback, then commit.D、Issue the configuration command delete interfaces ge-0/0/0 gigether-options loopback , then commit.
考题
A system administrator did not receive a response while attempting to ping loopback. Which of the following would most likely resolve this problem？（）A、Issue startsrc -s loopbackB、Issue startsrc -g tcpipC、Issue rc.tcpipD、Reconnect the network cable
考题
This question is about the formation of OSPF adjacency. An OSPF adjacency will not form correctly across a point-to-point link in the same area. Which would most likely cause this problem？（）A、Each interface has a different OSPF cost.B、Each interface is configured with secondary addresses as well as primary addresses.C、Each interface has a different MTU size.D、Each interface is configured with theip unnumbered loopback 0 command.
考题
OSPF is enabled on router A. You execute the following command on router A and receive theaccompanying output:RouterA#ping 224.0.0.5 repeat1Type escape sequence to abort.Sending 1, 1 00 - byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:Reply to request 0 from 10.100.100.1, 4 ms10.100.100.1 is the IP address of a loopback interface on router A. What can you conclude about router A?（）A、Only the router A loopback interface is parti cipating in the OSPF routing processB、None of the router A interfaces are participating in the OSPF routing processC、Router A is using the loopback interface IP address as its OSPF router IDD、Router A does not have any reachable OSPF neighbors
考题
Which of the following should a technician MOST likely use to test a RS-232 port?（）A、Loopback adapterB、Power supply testerC、The ping commandD、Multimeter
考题
In a cluster using /etc/hosts for name resolution， which of the following describes the minimum requirementsfor the /etc/hosts file？（）A、IP address and IP label of each service and boot interface in the clusterB、IP address and IP label of each service and boot interface in the cluster， loopback interface， and the hostname of the nodeC、IP address and IP label of each service and boot interface in the cluster， the loopbackinterface， and the cluster gatewayD、IP address and IP label of each service and boot interface in the cluster， the loopbackinterface， the cluster gateway， and the subnet network addresses
考题
The ping loopback hangs with no output. Which of the following is the most likely cause？（）A、The loopback interface is down and resolv.conf is configured.B、The loopback is not in /etc/hosts and resolv.conf is configured.C、The loopback interface is down and resolv.conf is not configured.D、The loopback is not in /etc/hosts and resolv.conf is not configured.
考题
The ping loopback hangs with no output. Which of the following is the most likely cause？（）A、The loopback interface is down and resolv.conf is configured.B、The loopback is not in /etc/hosts and resolv.conf is configured.C、The loopback interface is down and resolv.conf is not configured.D、The loopback is not in /etc/hosts and resolv.conf is not configured.
考题
When a local loopback is activated on a PPP serial link, what indicates that the local interface is good?（）A、A ping to the local address succeeds.B、A ping to the remote address succeeds.C、A ping to the remote address received a 'TTL expired' message.D、The interface shows a flag indicating that a loop is detected.
考题
Which set of commands correctly builds a PPP over Ethernet connection on a DSL connection?（）A、interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation ppp ppp authentication chap ip unnumbered loopback 1B、interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe interface pppoe 5/1.1 encapsulation ppp ppp authentication chap ip unnumbered loopback 1C、interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe interface atm 5/1.1.1 encap ppp ppp authentication chap ip unnumbered loopback 1D、interface atm 5/1.1 atm pvc 1 0 101 aal5snap encapsulation pppoe ppp authentication chap ip unnumbered loopback 1
考题
单选题In a cluster using /etc/hosts for name resolution， which of the following describes the minimum requirementsfor the /etc/hosts file？（）A
IP address and IP label of each service and boot interface in the clusterB
IP address and IP label of each service and boot interface in the cluster， loopback interface， and the hostname of the nodeC
IP address and IP label of each service and boot interface in the cluster， the loopbackinterface， and the cluster gatewayD
IP address and IP label of each service and boot interface in the cluster， the loopbackinterface， the cluster gateway， and the subnet network addresses
考题
单选题On the assumption that every OSPF router in a particular area is configured with there is no loopback interface set?（）A
The IP address of the first Fast Ethernet interface.B
The IP address of the console management interface.C
The highest IP address among its active interfaces.D
The lowest IP address among its active interfaces.E
There will be no router ID until a loopback interface is configured.
考题
单选题A system administrator did not receive a response while attempting to ping loopback. Which of the following would most likely resolve this problem？（）A
Issue startsrc -s loopbackB
Issue startsrc -g tcpipC
Issue rc.tcpipD
Reconnect the network cable
考题
单选题The following configuration exists on a router on one end of an IPv6 tunnel. Although the configuration added so far is correct, the configuration is incomplete. Which type of tunnel is most likely to be intended by the network engineer？（） interface loopback 1 ip address 192.168.1.1 255.255.255.255 interface tunnel 2 ipv6 address 2002:C0A8:10 1::1/64 tunnel source loopback 1A
Automatic 6to4B
Manually configured tunnelC
ISATAPD
GRE
考题
单选题In JUNOS software, which statement is true regarding the OSPF advertisement of the loopback IP address on the ABR?（）A
When Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised.B
When Area 0 is active, the loopback address is automatically advertised into other areas.C
When Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised.D
When Area 0 is active, the router-id must be configured for the loopback address to be advertised.
考题
单选题This question is about the formation of OSPF adjacency. An OSPF adjacency will not form correctly across a point-to-point link in the same area. Which would most likely cause this problem？（）A
Each interface has a different OSPF cost.B
Each interface is configured with secondary addresses as well as primary addresses.C
Each interface has a different MTU size.D
Each interface is configured with theip unnumbered loopback 0 command.
考题
单选题OSPF is enabled on router A. You execute the following command on router A and receive theaccompanying output:RouterA#ping 224.0.0.5 repeat1Type escape sequence to abort.Sending 1, 1 00 - byte ICMP Echos to 224.0.0.5, timeout is 2 seconds:Reply to request 0 from 10.100.100.1, 4 ms10.100.100.1 is the IP address of a loopback interface on router A. What can you conclude about router A?（）A
Only the router A loopback interface is parti cipating in the OSPF routing processB
None of the router A interfaces are participating in the OSPF routing processC
Router A is using the loopback interface IP address as its OSPF router IDD
Router A does not have any reachable OSPF neighbors
考题
单选题How is a loopback cleared on interface ge-0/0/0?（）A
Issue the operational command clear interfaces ge-0/0/0 loopback local.B
No command is necessary, the loopback times-out in 5 minutes.C
Issue the configuration command clear interfaces ge-0/0/0 loopback, then commit.D
Issue the configuration command delete interfaces ge-0/0/0 gigether-options loopback , then commit.
考题
单选题The ping loopback hangs with no output. Which of the following is the most likely cause？（）A
The loopback interface is down and resolv.conf is configured.B
The loopback is not in /etc/hosts and resolv.conf is configured.C
The loopback interface is down and resolv.conf is not configured.D
The loopback is not in /etc/hosts and resolv.conf is not configured.
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