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单选题
If an ethernet port on a router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet?（）
A
1024
B
2046
C
4094
D
4096
E
8190
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考题
If an Ethernet port on router was assigned an IP address of 172.16.112.1／20, what is the maximum number of hosts allowed on this subnet?()
A. 1024B. 2046C. 4094D. 4096E. 8190
考题
If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?()
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考题
Refer to the diagram. All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network? ()
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考题
If an ethernet port on a router was assigned an IP address of 172.16.112.1／20, what is the maximum number of hosts allowed on this subnet()。
A.1024B.2046C.4094D.4096E.8190
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In a PPP over ATM service offering, what is a valid method for assigning an address to the ERX Edge Router?（）A、DHCP assigned addressesB、RADIUS assigned addressesC、IP numbered with a loopback referenceD、IP unnumbered with a loopback reference
考题
Interface ge-0/0/2.0 of your router is attached to the Internet and is configured with an IP address and network mask of 71.33.252.17/24. A host with IP address 10.20.20.1 is running an HTTP service on TCP port 8080. This host isattached to the ge-0/0/0.0 interface of your router. You must use interface-based static NAT to make the HTTP service on the host reachable from the Internet. On which IP address and TCP port can Internet hosts reach the HTTP service?（）A、IP address 10.10.10.1 and TCP port 8080B、IP address 71.33.252.17 and TCP port 80C、IP address 71.33.251.19 and TCP port 80D、IP address 71.33.252.19 and TCP port 8080
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You have a Bridged 1483 service offering where each ATM PVC is assigned a /30 subnet. What are two characteristics of this configuration？（）A、It burns IP addresses.B、It conserves IP addresses.C、Both the client and the ERX Edge Router have IP addresses.D、The client has an IP address， but the ERX Edge Router uses an unnumbered address.
考题
A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）A、The address is a broadcast addressB、The Ehernet interface is faultyC、VLSM-capable routing protocols must be enable first on the router.D、This address is a network address.
考题
If an Ethernet port on a router was assigned an IP address of 172.1.1.1/20,what is the maximum number of hosts allowed on this subnet?（）A、4094B、1024C、8190D、2046E、4096
考题
Which three options are supported as address allocation mechanisms for DHCP on Cisco routers?（）A、The IP address can be automatically assigned to a host.B、The IP address can be assigned as a random hash value of the burned - in - address of the lowest - numbered LAN interface on the router.C、The network administrator can assign a speci fic IP address to a specific host MAC address.D、The IP address can be assigned from configured pools in a reverse lexicographical order.E、The IP address can be assigned to a host for a limited time or until the host explicitly releases the address.F、The IP address can be assigned to a host until the host usurps the assigned value using its own dynamic override mechanism.
考题
多选题Refer to the diagram. All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network? （）AThe subnet mask in use is 255.255.255.192.BThe subnet mask in use is 255.255.255.128.CThe IP address 172.16.1.25 can be assigned to hosts in VLAN1DThe IP address 172.16.1.205 can be assigned to hosts in VLAN1EThe LAN interface of the router is configured with one IP address.FThe LAN interface of the router is configured with multiple IP addresses.
考题
单选题Interface ge-0/0/2.0 of your router is attached to the Internet and is configured with an IP address and network mask of 71.33.252.17/24. A host with IP address 10.20.20.1 is running an HTTP service on TCP port 8080. This host isattached to the ge-0/0/0.0 interface of your router. You must use interface-based static NAT to make the HTTP service on the host reachable from the Internet. On which IP address and TCP port can Internet hosts reach the HTTP service?（）A
IP address 10.10.10.1 and TCP port 8080B
IP address 71.33.252.17 and TCP port 80C
IP address 71.33.251.19 and TCP port 80D
IP address 71.33.252.19 and TCP port 8080
考题
单选题What is true about IP Source Guard with port security？（）A
Binding should be manually configured.B
It is not supported if IEEE 802.1x port-based authentication is enabled.C
The DHCP server must support option 82， or the client is not assigned an IP address.D
It filters based on source IP address only.
考题
单选题Routers R1 and R2 are configured for HSRP as shown below： Router R1： interface ethernet 0 ip address 20.6.2.1 255.255.255.0 standby 35 ip 20.6.2.21 standby 35 priority 100 interface ethernet 1 ip address 20.6.1.1.2 255.255.255.0 standby 34 ip 20.6.1.21 Router R2： interface ethernet 0 ip address 20.6.2.2 255.255.255.0 standby 35 ip 20.6.2.21 interface ethernet 1 ip address 20.6.1.1.1 255.255.255.0 standby 34 ip 20.6.1.21 standby 34 priority 100 You have configured the routers R1 R2 with HSRP. While debugging router R2 you notice very frequent HSRP group state transitions. What is the most likely cause of this？ （）A
physical layer issuesB
no spanning tree loopsC
use of non-default HSRP timersD
failure to set the command standby 35 preempt
考题
单选题Routers R1 and R2 are configured for HSRP as shown below： Router R1： interface ethernet 0 ip address 20.6.2.1 255.255.255.0 standby 35 ip 20.6.2.21 standby 35 priority 100 interface ethernet 1 ip address 20.6.1.1.2 255.255.255.0 standby 34 ip 20.6.1.21 Router R2： interface ethernet 0 ip address 20.6.2.2 255.255.255.0 standby 35 ip 20.6.2.21 interface ethernet 1 ip address 20.6.1.1.1 255.255.255.0 standby 34 ip 20.6.1.21 standby 34 priority 100 You have configured the routers R1 R2 with HSRP. While debugging router R2 you notice veryfrequent HSRP group state transitions. What is the most likely cause of this？（）A
physical layer issuesB
no spanning tree loopsC
use of non-default HSRP timersD
failure to set the command standby 35 preempt
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.
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