Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 191:

  Which two statements about using the CHAP authentication mechanism in a PPP link are true? (Choose two.)

  A. CHAP uses a two-way handshake.
  B. CHAP uses a three-way handshake.
  C. CHAP authentication periodically occurs after link establishment.
  D. CHAP authentication passwords are sent in plaintext.
  E. CHAP authentication is performed only upon link establishment.
  F. CHAP has no protection from playback attacks.
  B. CHAP uses a three-way handshake.
  C. CHAP authentication periodically occurs after link establishment.

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  CHAP is an authentication scheme used by Point to Point Protocol (PPP) servers to validate the identity of remote clients. CHAP periodically verifies the identity of the client by using a three-way handshake. This happens at the time of establishing the initial link (LCP), and may happen again at any time afterwards. The verification is based on a shared secret (such as the client user's password).

• Question 192:

  If a router has four interfaces and each interface is connected to four switches, how many broadcast domains are present on the router?

  A. 1
  B. 2
  C. 4
  D. 8
  C. 4

• Question 193:

  Which type of EIGRP route entry describes a feasible successor?

  A. a backup route, stored in the routing table
  B. a primary route, stored in the routing table
  C. a backup route, stored in the topology table
  D. a primary route, stored in the topology table
  C. a backup route, stored in the topology table

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  EIGRP uses the Neighbor Table to list adjacent routers. The Topology Table list all the learned routers to destination whilst the Routing Table contains the best route to a destination, which is known as the Successor. The Feasible Successor is a backup route to a destination which is kept in the Topology Table.

• Question 194:

  Refer to the graphic.

  

  R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two.)

  A. All of the routers need to be configured for backbone Area 1.
  B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.
  C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.
  D. The hello and dead interval timers are not set to the same values on R1 and R3.
  E. EIGRP is also configured on these routers with a lower administrative distance.
  F. R1 and R3 are configured in different areas.
  D. The hello and dead interval timers are not set to the same values on R1 and R3.
  F. R1 and R3 are configured in different areas.

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  This question is to examine the conditions for OSPF to create neighborhood.

  So as to make the two routers become neighbors, each router must be matched with the following items:

  1.

  The area ID and its types;

  2.

  Hello and failure time interval timer;

  3.

  OSPF Password (Optional).

• Question 195:

  Which two statements about late collisions are true? (Choose two.)

  A. They may indicate a duplex mismatch.
  B. By definition, they occur after the 512th bit of the frame has been transmitted.
  C. They indicate received frames that did not pass the FCS match.
  D. They are frames that exceed 1518 bytes.
  E. They occur when CRC errors and interference occur on the cable.
  A. They may indicate a duplex mismatch.
  B. By definition, they occur after the 512th bit of the frame has been transmitted.

• Question 196:

  In which three ways is an IPv6 header simpler than an IPv4 header? (Choose three.)

  A. Unlike IPv4 headers, IPv6 headers have a fixed length.
  B. IPv6 uses an extension header instead of the IPv4 Fragmentation field.
  C. IPv6 headers eliminate the IPv4 Checksum field.
  D. IPv6 headers use the Fragment Offset field in place of the IPv4 Fragmentation field.
  E. IPv6 headers use a smaller Option field size than IPv4 headers.
  F. IPv6 headers use a 4-bit TTL field, and IPv4 headers use an 8-bit TTL field.
  A. Unlike IPv4 headers, IPv6 headers have a fixed length.
  B. IPv6 uses an extension header instead of the IPv4 Fragmentation field.
  C. IPv6 headers eliminate the IPv4 Checksum field.

• Question 197:

  Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch over Fast Ethernet?

  A. 802.3ad
  B. 802.1w
  C. 802.1D
  D. 802.1Q
  D. 802.1Q

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  Dynamic Trunking Protocol (DTP) is a Cisco proprietary protocol for negotiating trunking on a link between two devices and for negotiating the type of trunking encapsulation (802.1Q) to be used.

• Question 198:

  Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding 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 199:

  A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link.

  

  The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?

  A. The OSPF area is not configured properly.
  B. The priority on R1 should be set higher.
  C. The cost on R1 should be set higher.
  D. The hello and dead timers are not configured properly.
  E. A backup designated router needs to be added to the network.
  F. The OSPF process ID numbers must match.
  D. The hello and dead timers are not configured properly.

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  In OSPF, the hello and dead intervals must match and here we can see the hello interval is set to 5 on R1 and 10 on R2. The dead interval is also set to 20 on R1 but it is 40 on R2.

• Question 200:

  What Netflow component can be applied to an interface to track IPv4 traffic?

  A. flow monitor
  B. flow record
  C. flow sampler
  D. flow exporter
  A. flow monitor

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  Flow monitors are the Flexible NetFlow component that is applied to interfaces to perform network traffic monitoring. Flow monitors consist of a record and a cache. You add the record to the flow monitor after you create the flow monitor. The

  flow monitor cache is automatically created at the time the flow monitor is applied to the first interface. Flow data is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record, which is

  configured for the flow monitor and stored in the flow monitor cache.

  For example, the following example creates a flow monitor named FLOW-MONITOR-1 and enters Flexible NetFlow flow monitor configuration mode:

  Router(config)# flow monitor FLOW-MONITOR-1

  Router(config-flow-monitor)#