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Home Cisco® 200-125

Cisco® 200-125 Exam Practice Questions (P. 2)

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Question #11
Which of the following protocols uses both TCP and UDP ports?
  1. A
    SMTP
  2. B
    Telnet
  3. C
    FTP
  4. D
    DNS

Correct Answer:
D

Question #12
Refer to the exhibit.

Host A pings interface S0/0 on router 3. What is the TTL value for that ping?
  1. A
    252
  2. B
    253
  3. C
    254
  4. D
    255

Correct Answer:
B
The default TTL is 255, and as a packet passes through a router the TTL is decremented. By the time the ping packet reaches S0/0 on Router 3, it has passed through two routers and the TTL is now 253. Note that the S0/0 interface responds to the ping: the packet is not routed by Router 3 and so the TTL in the ping packet is not decremented to 252.

Question #13
An administrator must assign static IP addresses to the servers in a network.
For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address.
Which of the following should be entered into the IP properties box for the sales server?
  1. A
    IP address: 192.168.20.14 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.9
  2. B
    IP address: 192.168.20.254 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.20.1
  3. C
    IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25
  4. D
    IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.17
  5. E
    IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.25

Correct Answer:
C
A /29 network has only 8 IP addresses, of which 6 are usable IP addresses. This means that 192.168.20.24 represents the network, 192.168.20.25 is the first usable IP address, 192.168.20.30 is the last usable IP address and 192.168.20.31 is the broadcast address on the network. Another way to write /29 is
255.255.255.248, so the answer is C.

Question #14
Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?
  1. A
    0.0.0.240
  2. B
    255.255.255.252
  3. C
    255.255.255.0
  4. D
    255.255.255.224
  5. E
    255.255.255.240

Correct Answer:
D
We need 26 usable IP addresses, so we need subnets with a range of 32 addresses. This is the /27 netmask, or 255.255.255.224.

Question #15
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.)
  1. A
    255.255.255.0
  2. B
    255.255.255.128
  3. C
    255.255.252.0
  4. D
    255.255.255.224
  5. E
    255.255.255.192
  6. F
    255.255.248.0

Correct Answer:
BE
50 hosts per subnet, so we'd need a range of 64 IP addresses which is a /26. This converts to a mask of 255.255.255.192.

Question #16
When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two.)
  1. A
    network or subnetwork IP address
  2. B
    broadcast address on the network
  3. C
    IP address leased to the LAN
  4. D
    IP address used by the interfaces
  5. E
    manually assigned address to the clients
  6. F
    designated IP address to the DHCP server

Correct Answer:
AB

Question #17
What will happen if a private IP address is assigned to a public interface connected to an ISP?
  1. A
    Addresses in a private range will be not routed on the Internet backbone.
  2. B
    Only the ISP router will have the capability to access the public network.
  3. C
    The NAT process will be used to translate this address in a valid IP address.
  4. D
    Several automated methods will be necessary on the private network.
  5. E
    A conflict of IP addresses happens, because other public routers can use the same range.

Correct Answer:
A

Question #18
Refer to the exhibit.
An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?

  1. A
    data link layer
  2. B
    application layer
  3. C
    access layer
  4. D
    session layer
  5. E
    network layer

Correct Answer:
E

Question #19
Refer to the exhibit. A new subnet with 60 hosts has been added to the network.
Which subnet address should this network use to provide enough usable addresses while wasting the fewest addresses?

  1. A
    192.168.1.56/27
  2. B
    192.168.1.64/26
  3. C
    192.168.1.64/27
  4. D
    192.168.1.56/26

Correct Answer:
B

Question #20
Refer to the exhibit. Which subnet mask will place all hosts on Network B in the same subnet with the least amount of wasted addresses?

  1. A
    255.255.255.0
  2. B
    255.255.254.0
  3. C
    255.255.252.0
  4. D
    255.255.248.0

Correct Answer:
B

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