Cisco 200-101 Online Practice Questions and Exam Preparation

Cisco 200-101 Online Questions & Answers

• Question 61:

  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.

• Question 62:

  The output of the show frame-relay pvc command shows "PVC STATUS = INACTIVE". What does this mean?

  A. The PVC is configured correctly and is operating normally, but no data packets have been detected for more than five minutes.
  B. The PVC is configured correctly, is operating normally, and is no longer actively seeking the address of the remote router.
  C. The PVC is configured correctly, is operating normally, and is waiting for interesting traffic to trigger a call to the remote router.
  D. The PVC is configured correctly on the local switch, but there is a problem on the remote end of the PVC.
  E. The PVC is not configured on the local switch.
  D. The PVC is configured correctly on the local switch, but there is a problem on the remote end of the PVC.

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  The PVC STATUS displays the status of the PVC. The DCE device creates and sends the report to the DTE devices. There are 4 statuses:

  ACTIVE: the PVC is operational and can transmit data INACTIVE: the connection from the local router to the switch is working, but the connection to the remote router is not available DELETED: the PVC is not present and no LMI information is being received from the Frame Relay switch STATIC: the Local Management Interface (LMI) mechanism on the interface is disabled (by using the "no keepalive" command). This status is rarely seen.

• Question 63:

  Which port state is introduced by Rapid-PVST?

  A. learning
  B. listening
  C. discarding
  D. forwarding
  C. discarding

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  Spanning Tree from PVST+ to Rapid-PVST Migration Configuration Example Reference 1: http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_example09186a00807 b0670.shtml

  Reference 2: http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml

  PVST+ is based on IEEE802.1D Spanning Tree Protocol (STP). But PVST+ has only 3 port states (discarding, learning and forwarding) while STP has 5 port states (blocking, listening, learning, forwarding and disabled). So discarding is a new port state in PVST+.

  

  Background Information

  802.1D Spanning Tree Protocol (STP) has a drawback of slow convergence. Cisco Catalyst switches support three types of STPs, which are PVST+, rapid-PVST+ and MST. PVST+ is based on IEEE802.1D standard and includes Cisco

  proprietary extensions such as BackboneFast, UplinkFast, and PortFast. Rapid-PVST+ is based on IEEE 802.1w standard and has a faster convergence than 802.1D. RSTP (IEEE 802.1w) natively includes most of the Cisco proprietary

  enhancements to the 802.1D Spanning Tree, such as BackboneFast and UplinkFast. Rapid- PVST+ has these unique features:

  Uses Bridge Protocol Data Unit (BPDU) version 2 which is backward compatible with the 802.1D STP, which uses BPDU version 0. All the switches generate BPDUs and send out on all the ports every 2 seconds, whereas in 802.1D STP only

  the root bridge sends the configuration BPDUs. Port Roles--Root port, designated port, alternate port and backup port.

  Port States--Discarding, Learning, and Forwarding.

  Port Types--Edge Port (PortFast), Point-to-Point and Shared port. Rapid-PVST uses RSTP to provide faster convergence. When any RSTP port receives legacy 802.1D BPDU, it falls back to legacy STP and the inherent fast convergence

  benefits of 802.1w are lost when it interacts with legacy bridges.

• Question 64:

  Which term describes a spanning-tree network that has all switch ports in either the blocking or fowarding state?

  A. converged
  B. redundant
  C. provisioned
  D. spanned
  A. converged

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  Spanning Tree Protocol convergence (Layer 2 convergence) happens when bridges and switches have transitioned to either the forwarding or blocking state. When layer 2 is converged, root bridge is elected and all port roles (Root, Designated and Non-Designated) in all switches are selected.

• Question 65:

  Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

  A. hop count
  B. administrative distance
  C. link bandwidth
  D. link delay
  E. link cost
  B. administrative distance

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  What Is Administrative Distance? http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml Administrative distance is the feature that routers use in order to select the best path. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the

  help of an administrative distance value. Lowest Administrative distance will be chosen first.

  

• Question 66:

  What are two characteristics of a switch that is configured as a VTP client? (Choose two.)

  A. If a switch that is configured to operate in client mode cannot access a VTP server, then the switch reverts to transparent mode.
  B. On switches that are configured to operate in client mode, VLANs can be created, deleted, or renamed locally.
  C. The local VLAN configuration is updated only when an update that has a higher configuration revision number is received.
  D. VTP advertisements are not forwarded to neighboring switches that are configured in VTP transparent mode.
  E. VTP client is the default VTP mode.
  F. When switches in VTP client mode are rebooted, they send a VTP advertisement request to the VTP servers.
  C. The local VLAN configuration is updated only when an update that has a higher configuration revision number is received.
  F. When switches in VTP client mode are rebooted, they send a VTP advertisement request to the VTP servers.

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  VLAN Trunking Protocol (VTP) http://archive.networknewz.com/2004/0317.html

  VTP Modes Server Mode Once VTP is configured on a Cisco switch, the default mode used is Server Mode. In any given VTP management domain, at least one switch must be in Server Mode. When in Server Mode, a switch can be used to add, delete, and modify VLANs, and this information will be passed to all other switches in the VTP management domain. Client Mode When a switch is configured to use VTP Client Mode, it is simply the recipient of any VLANs added, deleted, or modified by a switch in Server Mode within the same management domain. A switch in VTP client mode cannot make any changes to VLAN information. Transparent Mode A switch in VTP Transparent Mode will pass VTP updates received by switches in Server Mode to other switches in the VTP management domain, but will not actually process the contents of these messages. When individual VLANs are added, deleted, or modified on a switch running in transparent mode, the changes are local to that particular switch only, and are not passed to other switches in the VTP management domain.

• Question 67:

  What are two benefits of using a single OSPF area network design? (Choose two.)

  A. It is less CPU intensive for routers in the single area.
  B. It reduces the types of LSAs that are generated.
  C. It removes the need for virtual links.
  D. It increases LSA response times.
  E. It reduces the number of required OSPF neighbor adjacencies.
  B. It reduces the types of LSAs that are generated.
  C. It removes the need for virtual links.

• Question 68:

  What are three factors a network administrator must consider before implementing Netflow in the network? (Choose three.)

  A. CPU utilization
  B. where Netflow data will be sent
  C. number of devices exporting Netflow data
  D. port availability
  E. SNMP version
  F. WAN encapsulation
  A. CPU utilization
  B. where Netflow data will be sent
  C. number of devices exporting Netflow data

• Question 69:

  Which statement describes VRRP object tracking?

  A. It monitors traffic flow and link utilization.
  B. It ensures the best VRRP router is the virtual router master for the group.
  C. It causes traffic to dynamically move to higher bandwidth links.
  D. It thwarts man-in-the-middle attacks.
  B. It ensures the best VRRP router is the virtual router master for the group.

• Question 70:

  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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  Link State Routing Protocols

  http://www.ciscopress.com/articles/article.asp?p=24090andseqNum=4

  Link state protocols, sometimes called shortest path first or distributed database protocols, are built around a well-known algorithm from graph theory, E. W.

  Dijkstra'a shortest path algorithm.

  Examples of link state routing protocols are:

  Open Shortest Path First (OSPF) for IP

  The ISO's Intermediate System to Intermediate System (IS-IS) for CLNS and IP DEC's DNA Phase V Novell's NetWare Link Services Protocol (NLSP)

  Although link state protocols are rightly considered more complex than distance vector protocols, the basic functionality is not complex at all:

  1.

  Each router establishes a relationship--an adjacency--with each of its neighbors.

  2.

  Each router sends link state advertisements (LSAs), some

  3.

  Each router stores a copy of all the LSAs it has seen in a database. If all works well, the databases in all routers should be identical.

  4.

  The completed topological database, also called the link state database, describes a graph of the internetwork. Using the Dijkstra algorithm, each router calculates the shortest path to each network and enters this information into the route table.