200-125 Exam
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Q71. - (Topic 3)
Refer to the exhibit.
Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?
A. 10.1.1.2
B. 10.154.154.1
C. 172.16.5.1
D. 192.168.5.3
Answer: C
Explanation:
The highest IP address of all loopback interfaces will be chosen -> Loopback 0 will be chosen as the router ID.
Q72. - (Topic 5)
What are the alert messages generated by SNMP agents called?
A. TRAP
B. INFORM
C. GET
D. SET
Answer: A,B
Explanation:
A TRAP is a SNMP message sent from one application to another (which is typically on a remote host). Their purpose is merely to notify the other application that something has happened, has been noticed, etc. The big problem with TRAPs is that they’re
unacknowledged so you don’t actually know if the remote application received your oh-so- important message to it. SNMPv2 PDUs fixed this by introducing the notion of an INFORM, which is nothing more than an acknowledged TRAP.
Q73. . - (Topic 3)
A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS image. What function does the router perform next?
A. It checks the configuration register.
B. It attempts to boot from a TFTP server.
C. It loads the first image file in flash memory.
D. It inspects the configuration file in NVRAM for boot instructions.
Answer: A
Explanation:
Default (normal) Boot Sequence
Power on Router - Router does POST - Bootstrap starts IOS load - Check configuration register to see what mode the router should boot up in (usually 0x2102 to read startup- config in NVRAM / or 0x2142 to start in "setup-mode") - check the startup-config file in NVRAM for boot-system commands - load IOS from Flash.
Q74. - (Topic 4)
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following procedures are required to accomplish this task? (Choose three.)
A. Remove the IP address from the physical interface.
B. Encapsulate the physical interface with multipoint PPP.
C. Create the virtual interfaces with the interface command.
D. Configure each subinterface with its own IP address.
E. Disable split horizon to prevent routing loops between the subinterface networks.
F. Configure static Frame Relay map entries for each subinterface network.
Answer: A,C,D
Explanation:
For multiple PVC’s on a single interface, you must use subinterfaces, with each subinterface configured for each PVC. Each subinterface will then have its own IP address, and no IP address will be assigned to the main interface.
Q75. - (Topic 8)
Which two statements about late collisions are true? (Choose two.)
A. They may indicate a duplex mismatch.
B. By definition, they occur after the 512th bit of the frame has been transmitted.
C. They indicate received frames that did not pass the FCS match.
D. They are frames that exceed 1518 bytes.
E. They occur when CRC errors and interference occur on the cable.
Answer: A,B
Q76. CORRECT TEXT - (Topic 7)
CCNA.com has a small network that is using EIGRP as its IGP. All routers should be running an EIGRP AS number of 12. Router MGT is also running static routing to the ISP.
CCNA.com has recently added the ENG router. Currently, the ENG router does not have connectivity to the ISP router. All over interconnectivity and Internet access for the existing locations of the company are working properly.
The task is to identify the fault(s) and correct the router configuration(s) to provide full connectivity between the routers.
Access to the router CLI can be gained by clicking on the appropriate host.
All passwords on all routers are cisco.
IP addresses are listed in the chart below.
MGT
Fa0/0 – 192.168.77.33
S1/0 – 198.0.18.6
S0/0 – 192.168.27.9
S0/1 – 192.168.50.21
ENG
Fa0/0 – 192.168.77.34
Fa1/0 – 192.168.12.17
Fa0/1 – 192.168.12.1
Parts1
Fa0/0 – 192.168.12.33
Fa0/1 – 192.168.12.49
S0/0 – 192.168.27.10
Parts2
Fa0/0 – 192.168.12.65
Fa0/1 – 192.168.12.81
S0/1 – 192.168.50.22
Answer:
On the MGT Router: Config t
Router eigrp 12
Network 192.168.77.0
Q77. - (Topic 8)
Which IPV6 function serves the same purpose as ARP entry verification on an IPv4 network?
A. interface ip address verification.
B. MAC address table verification
C. neighbor discovery verification
D. routing table entry verification
Answer: C
Q78. - (Topic 5)
A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? (Choose two.)
A. 255.255.255.0
B. 255.255.255.128
C. 255.255.252.0
D. 255.255.255.224
E. 255.255.255.192
F. 255.255.248.0
Answer: B,E
Explanation:
Subnetting is used to break the network into smaller more efficient subnets to prevent excessive rates of Ethernet packet collision in a large network. Such subnets can be arranged hierarchically, with the organization's network address space (see also Autonomous System) partitioned into a tree-like structure. Routers are used to manage traffic and constitute borders between subnets.
A routing prefix is the sequence of leading bits of an IP address that precede the portion of the address used as host identifier. In IPv4 networks, the routing prefix is often expressed as a "subnet mask", which is a bit mask covering the number of bits used in the prefix. An IPv4 subnet mask is frequently expressed in quad-dotted decimal representation, e.g., 255.255.255.0 is the subnet mask for the 192.168.1.0 network with a 24-bit routing prefix (192.168.1.0/24).
Q79. - (Topic 5)
Which two statements about static NAT translations are true? (Choose two.)
A. They allow connections to be initiated from the outside.
B. They require no inside or outside interface markings because addresses are statically defined.
C. They are always present in the NAT table.
D. They can be configured with access lists, to allow two or more connections to be initiated from the outside.
Answer: A,C
Explanation:
Static NAT is to map a single outside IP address to a single inside IP address. This is typically done to allow incoming connections from the outside (Internet) to the inside. Since these are static, they are always present in the NAT table even if they are not actively in use.
Q80. - (Topic 8)
Which address class includes network 191.168.0.1/27?
A. Class C
B. Class B
C. Class D
D. Class A
Answer: B