Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 1251:

  How many primary IPv4 addresses can be assigned to an interface?

  A. unlimited
  B. 8
  C. 2
  D. 1
  D. 1

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  Cisco IOS software supports multiple IP addresses per interface. You can specify an unlimited number of secondary addresses.

• Question 1252:

  What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two.)

  A. hello packets
  B. SAP messages sent by other routers
  C. LSAs from other routers
  D. beacons received on point-to-point links
  E. routing tables received from other link-state routers
  F. TTL packets from designated routers
  A. hello packets
  C. LSAs from other routers

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  Neighbor discovery is the first step in getting a link state environment up and running. In keeping with the friendly neighbor terminology, a Hello protocol is used for this step. The protocol will define a Hello packet format and a procedure for

  exchanging the packets and processing the information the packets contain.

  After the adjacencies are established, the routers may begin sending out LSAs. As the term flooding implies, the advertisements are sent to every neighbor. In turn, each received LSA is copied and forwarded to every neighbor except the one

  that sent the LSA.

• Question 1253:

  which functionality does split horizon provide ?

  A. it Prevents routing loops in distance vector protocols
  B. it Prevents switching loops in distance vector protocols
  C. it Prevents switching loops in link-state protocols
  D. it Prevents routing loops in link-state protocols
  A. it Prevents routing loops in distance vector protocols

• Question 1254:

  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.)

  A. The number of collision domains would remain the same.
  B. The number of collision domains would decrease.
  C. The number of collision domains would increase.
  D. The number of broadcast domains would remain the same.
  E. The number of broadcast domains would decrease.
  F. The number of broadcast domains would increase.
  C. The number of collision domains would increase.
  D. The number of broadcast domains would remain the same.

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  Basically, a collision domain is a network segment that allows normal network traffic to flow back and forth. In the old days of hubs, this meant you had a lot of collisions, and the old CSMA/CD would be working overtime to try to get those

  packets re-sent every time there was a collision on the wire (since Ethernet allows only one host to be transmitting at once without there being a traffic jam). With switches, you break up collision domains by switching packets bound for other

  collision domains. These days, since we mostly use switches to connect computers to the network, you generally have one collision domain to a PC.

  Broadcast domains are exactly what they imply: they are network segments that allow broadcasts to be sent across them. Since switches and bridges allow for broadcast traffic to go unswitched, broadcasts can traverse collision domains

  freely. Routers, however, don't allow broadcasts through by default, so when a broadcast hits a router (or the perimeter of a VLAN), it doesn't get forwarded. The simple way to look at it is this way:

  switches break up collision domains, while routers (and VLANs) break up collision domains and broadcast domains. Also, a broadcast domain can contain multiple collision domains, but a collision domain can never have more than one

  broadcast domain associated with it.

  Collision Domain: A group of Ethernet or Fast Ethernet devices in a CSMA/CD LAN that are connected by repeaters and compete for access on the network. Only one device in the collision domain may transmit at any one time, and the other

  devices in the domain listen to the network in order to avoid data collisions. A collision domain is sometimes referred to as an Ethernet segment.

  Broadcast Domain: Broadcasting sends a message to everyone on the local network (subnet). An example for Broadcasting would be DHCP Request from a Client PC. The Client is asking for a IP Address, but the client does not know how to

  reach the DHCP Server. So the client sends a DHCP Discover packet to EVERY PC in the local subnet (Broadcast). But only the DHCP Server will answer to the Request.

  How to count them?

  Broadcast Domain:

  No matter how many hosts or devices are connected together, if they are connected with a repeater, hub, switch or bridge, all these devices are in ONE Broadcast domain (assuming a single VLAN). A Router is used to separate Broadcast-

  Domains (we could also call them Subnets - or call them VLANs).

  So, if a router stands between all these devices, we have TWO broadcast domains.

  Collision Domain:

  Each connection from a single PC to a Layer 2 switch is ONE Collision domain. For example, if 5 PCs are connected with separate cables to a switch, we have 5 Collision domains. If this switch is connected to another switch or a router, we

  have one collision domain more.

  If 5 Devices are connected to a Hub, this is ONE Collision Domain. Each device that is connected to a Layer 1 device (repeater, hub) will reside in ONE single collision domain.

• Question 1255:

  Drag and Drop.

  Select and Place:

  

  

• Question 1256:

  Which port status does the interface enter when UDLD detects a unidirectional link?

  A. shutdown
  B. up/up
  C. down/down
  D. errdisable
  D. errdisable

• Question 1257:

  which circumstance is a common cause of late collisions?

  A. native VLAN mismatch
  B. overloaded hardware queues
  C. duplex mismatch
  D. software misconfiguration
  C. duplex mismatch

• Question 1258:

  which command can you enter in a network switch configuration so that learned mac addresses are saved in configuration as they connect ?

  A. Switch(config-if)#Switch port-security
  B. Switch(config-if)#Switch port-security Mac-address sticky
  C. Switch(config-if)#Switch port-security maximum 10
  D. Switch(config-if)#Switch mode access
  B. Switch(config-if)#Switch port-security Mac-address sticky

• Question 1259:

  Which statement about 6to4 tunneling is true?

  A. One tunnel endpoint must be configured with IPv4 only.
  B. Both tunnel endpoint must be configured with IPv4 only.
  C. It establishes a point-to-point tunnel.
  D. Both tunnel endpoints must support IPv4 and IPv6.
  D. Both tunnel endpoints must support IPv4 and IPv6.

• Question 1260:

  

  Refer to the exhibit. The network administrator is testing connectivity from the branch router to the newly installed application server. Which reason is the most likely for the first ping having a success rate of only 60 percent?

  A. The branch router LAN interface should be upgraded to FastEthernet.
  B. The branch router had to resolve the application server MAC address.
  C. The network is likely to be congested, with the result that packets are being intermittently dropped.
  D. There is a short delay while NAT translates the server IP address.
  B. The branch router had to resolve the application server MAC address.