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Home Cisco® 200-125

Cisco® 200-125 Exam Practice Questions (P. 1)

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Question #1
A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?
  1. A
    This is a 10 Mb/s switch port.
  2. B
    This is a 100 Mb/s switch port.
  3. C
    This is an Ethernet port operating at half duplex.
  4. D
    This is an Ethernet port operating at full duplex.
  5. E
    This is a port on a network interface card in a PC.

Correct Answer:
C
The only time that CSMA/CD (carrier sense medium access with collision detection) is ever needed is when the medium is shared by all devices. In this situation, devices can never send and receive at the same time; they must operate in half-duplex mode. The bitrate is irrelevant.

Question #2
A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?
  1. A
    physical
  2. B
    session
  3. C
    data link
  4. D
    transport
  5. E
    network

Correct Answer:
C
Operations on frames occur at the data link layer.

Question #3
Refer to the graphic.

Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?
  1. A
    the MAC address of the server network interface
  2. B
    the MAC address of host A
  3. C
    the MAC address of router interface e1
  4. D
    the MAC address of router interface e0

Correct Answer:
D
Host A and the Server are on different subnets and are separated by routers, so the MAC address of the Server will never get back to Host A: the router will decapsulate the frames that the Server sends. The router will re-encapsulate the packets from the Server and and put its own MAC address on the outbound interface (e0) in the frames. Host A will see the MAC address of router interface e0.

Question #4
Refer to the exhibit.
What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two.)

  1. A
    The number of broadcast domains would remain the same.
  2. B
    The number of collision domains would increase.
  3. C
    The number of collision domains would decrease.
  4. D
    The number of broadcast domains would decrease.
  5. E
    The number of collision domains would remain the same.
  6. F
    The number of broadcast domains would increase.

Correct Answer:
AB
Only routers create broadcast domains, so the number of broadcast domains will be unchanged. A hub is a single collision domain, whereas each port on a switch is its own collision domain. Therefore, by adding a switch the number of collision domains will increase.

Question #5
What is the first 24 bits in a MAC address called?
  1. A
    NIC
  2. B
    BIA
  3. C
    OUI
  4. D
    VAI

Correct Answer:
C

Question #6
Refer to the exhibit. What type of connection would be supported by the cable diagram shown?

  1. A
    PC to router
  2. B
    PC to switch
  3. C
    server to router
  4. D
    router to router

Correct Answer:
B
From the "Pin" and "Color" in the exhibit we know that this is a straight-through cable so it can be used to connect PC to switch.

Question #7
What functions do routers perform in a network? (Choose two)
  1. A
    packet switching
  2. B
    access layer security
  3. C
    path selection
  4. D
    VLAN membership assignment
  5. E
    bridging between LAN segments
  6. F
    microsegmentation of broadcast domains

Correct Answer:
AC

Question #8
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 network administrator is using for this operation?
  1. A
    application
  2. B
    presentation
  3. C
    session
  4. D
    transport
  5. E
    internet
  6. F
    data link

Correct Answer:
A
FTP is an application layer protocol, so this is the highest OSI layer involved in the operation.

Question #9
Which statement describes the process of dynamically assigning IP addresses by the DHCP server?
  1. A
    Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
  2. B
    Addresses are permanently assigned so that the hosts uses the same address at all times.
  3. C
    Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
  4. D
    Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.

Correct Answer:
D

Question #10
How does a DHCP server dynamically assign IP addresses to hosts?
  1. A
    Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
  2. B
    Addresses are permanently assigned so that the hosts uses the same address at all times.
  3. C
    Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
  4. D
    Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

Correct Answer:
D

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