Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 171:

  Which two of these are characteristics of the 802.1Q protocol? (Choose two.)

  A. It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
  B. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
  C. It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
  D. It includes an 8-bit field which specifies the priority of a frame.
  E. It is a trunking protocol capable of carrying untagged frames.
  B. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
  E. It is a trunking protocol capable of carrying untagged frames.

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  802.1Q protocol, or Virtual Bridged Local Area Networks protocol, mainly stipulates the realization of the VLAN. 802.1Q is a standardized relay method that inserts 4 bytes field into the original Ethernet frame and re-calculate the FCS. 802.1Q frame relay supports two types of frame: marked and non-marked. Non-marked frame carries no VLAN identification information.

• Question 172:

  Which command is used to enable CHAP authentication, with PAP as the fallback method, on a serial interface?

  A. Router(config-if)# ppp authentication chap fallback ppp
  B. Router(config-if)# ppp authentication chap pap
  C. Router(config-if)# authentication ppp chap fallback ppp
  D. Router(config-if)# authentication ppp chap pap
  B. Router(config-if)# ppp authentication chap pap

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  This command tells the router first to use CHAP and then go to PAP if CHAP isn't available.

• Question 173:

  Refer to the exhibit .

  

  if R1 sends Traffic to 192.168.10.45 the traffic is sent through which interface ?

  A. FastEthernet 0/1
  B. FastEthernet 0/0
  C. FastEthernet 1/0
  D. FastEthernet 1/1
  A. FastEthernet 0/1

• Question 174:

  What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?

  A. SNMP
  B. Netflow
  C. WCCP
  D. IP SLA
  B. Netflow

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  Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools. Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/iosnetflow/prod_white_paper0900aecd80406232.html

• Question 175:

  Which two statements about the OSPF Router ID are true? (Choose two.)

  A. It identifies the source of a Type 1 LSA.
  B. It should be the same on all routers in an OSPF routing instance.
  C. By default, the lowest IP address on the router becomes the OSPF Router ID.
  D. The router automatically chooses the IP address of a loopback as the OSPF Router ID.
  E. It is created using the MAC Address of the loopback interface.
  A. It identifies the source of a Type 1 LSA.
  D. The router automatically chooses the IP address of a loopback as the OSPF Router ID.

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  r120#show ip ospf data OSPF Router with ID (10.0.0.120) (Process ID 1) Next, who are the other routers in our area? Router Link States (Area 1) Link IDADV RouterAgeSeq#ChecksumLink count 10.0.0.11110.0.0.1116000x8000023A 0x0092B31 10.0.0.11210.0.0.11212460x80000234 0x009CAC1 10.0.0.11310.0.0.1131480x8000022C0x0043993 10.0.0.12010.0.0.1201520x800002400x0046CB1 We can see OSPF Router ID will be used as source of Type 1 LSA. Also the router will chose the highest loopback interface as its OSPF router ID (if available).

• Question 176:

  Refer to the exhibit.

  

  A network administrator attempts to ping Host2 from Host1 and receives the results that are shown. What is the problem?

  A. The link between Host1 and Switch1 is down.
  B. TCP/IP is not functioning on Host1
  C. The link between Router1 and Router2 is down.
  D. The default gateway on Host1 is incorrect.
  E. Interface Fa0/0 on Router1 is shutdown.
  F. The link between Switch1 and Router1 is down.
  C. The link between Router1 and Router2 is down.

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  Host1 tries to communicate with Host2. The message destination host unreachable from Router1 indicates that the problem occurs when the data is forwarded from Host1 to Host2. According to the topology, we can infer that the link between Router1 and Router2 is down.

• Question 177:

  Which two statements about the ip default-network command are true? (Choose two.)

  A. It specifies the network that is used when the device cannot find an exact match in the routing table.
  B. It can be configured on a Layer 2 switch to specify the next hop.
  C. It specifies the network that is used when the device finds an exact match in the routing table.
  D. It requires IP routing to be enabled on the device.
  E. It requires IP routing to be disabled on the device.
  A. It specifies the network that is used when the device cannot find an exact match in the routing table.
  D. It requires IP routing to be enabled on the device.

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  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/xe-3se/3650/iri-xe-3se-3650-book/iri-iprouting.html

• Question 178:

  Which two statements about exterior routing protocols are true?(choose two)

  A. They determine the optimal path between autonomous systems
  B. They determine the optimal path within an autonomous systems
  C. Most modern networking supports both EGP and BGP for external routing
  D. Most modern network routes support both EGP and EIGRP for external routing
  E. BGP is the current standard exterior routing protocol
  A. They determine the optimal path between autonomous systems
  E. BGP is the current standard exterior routing protocol

• Question 179:

  Drag and Drop the protocols from the left onto the correct IP traffic types on the right.

  Select and Place:

  

  

• Question 180:

  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
  B. 255.255.255.128
  E. 255.255.255.192

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  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).