Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 171:

  Which EIGRP configuration results in subsecond failover outside of the basic routing protocol convergence?

  A. bfd all-interfaces
  B. timers active-time disabled
  C. timers active-time 1
  D. timers nsf route-hold 20
  A. bfd all-interfaces

• Question 172:

  Refer to the exhibit.

  

  A PE router is configured with a policy map that contains the policer shown. The policy map is configured in the inbound direction of an interface facing a CE router. If the PE router receives 12Mb/s of traffic with the CoS value set to 7 on a

  100-Mb/s interface from the CE router, what value of MPLS EXP is set when this traffic goes through the policer shown?

  B. 6
  C. 7
  D. 8
  B. 6

  ---

  Here, the policer is set where the conforming traffic is set to 10 percent of the 100 Mbps interface, so anything more than 10 Mbps will be placed into the exceeding traffic class, the traffic EXP value will be changed from 7 to 6 per the configuration.

• Question 173:

  Refer to the exhibit.

  

  Which statement about the topology is true?

  A. It provides a transparent LAN service.
  B. It provides only point-to-multipoint connections between UNIs.
  C. It uses port-based connections at the hub.
  D. It provides point-to-point connections between UNIs.
  D. It provides point-to-point connections between UNIs.

• Question 174:

  Refer to the exhibit.

  

  Which additional configuration is necessary for R1 and R2 to become OSPF neighbors?

  A. R1 ! router ospf 1 no passive-interface Fastethernet0/0 !
  B. R2 ! router ospf 10 no network 10.1.1.6 0.0.0.0 area 0 network 10.1.1.6 0.0.0.0 area 1 !
  C. R1 ! interface FastEthernet0/0 ip ospf mtu-ignore ! R2 ! interface FastEthernet0/1 ip ospf mtu-ignore !
  D. R1 ! no router ospf 1 router ospf 10 network 10.1.1.5 0.0.0.0 area 0
  A. R1 ! router ospf 1 no passive-interface Fastethernet0/0 !

  ---

  Because the passive interface default command is used, by default all interfaces are passive and no neighbors will form on these interfaces. We need to disable passive interface on the link to R2 by using the "no passive-interface Fastethernet0/0" on R1 under OSPF.

• Question 175:

  What are two benefits of NVI? (Choose two.)

  A. It provides scalability by maintaining a NAT table on every interface.
  B. It can dynamically create a static route to the NAT pool for translation.
  C. It supports the use of route maps for policy-based NAT.
  D. It supports the use of a single interface for translations.
  E. It injects a route into the existing routing protocol that directs translation to the NAT pool.
  A. It provides scalability by maintaining a NAT table on every interface.
  B. It can dynamically create a static route to the NAT pool for translation.

• Question 176:

  Which two features are supported when Cisco HDLC is implemented? (Choose two.)

  A. error recovery
  B. error detection
  C. asynchronous links
  D. multiple protocols
  B. error detection
  D. multiple protocols

  ---

  HDLC's frame check sequence (FCS) is a 16-bit CRC-CCITT or a 32-bit CRC-32 computed over the Address, Control, and Information fields. It provides a means by which the receiver can detect errors that may have been induced during the transmission of the frame, such as lost bits, flipped bits, and extraneous bits. Cisco's HDLC contains a proprietary field that is used to support multiple protocols.

  Reference: http://en.wikipedia.org/wiki/High-Level_Data_Link_Control

• Question 177:

  What is the destination MAC address of a BPDU frame?

  A. 01-80-C2-00-00-00
  B. 01-00-5E-00-00-00
  C. FF-FF-FF-FF-FF-FF
  D. 01-80-C6-00-00-01
  A. 01-80-C2-00-00-00

  ---

  The root-bridge election process begins by having every switch in the domain believe it is the root and claiming it throughout the network by means of Bridge Protocol Data Units (BPDU). BPDUs are Layer 2 frames multicast to a well-known MAC address in case of IEEE STP (01-80-C2-00-00-00) or vendor-assigned addresses, in other cases.

  Reference: http://www.ciscopress.com/articles/article.asp?p=1016582

• Question 178:

  Which attribute is not part of the BGP extended community when a PE creates a VPN-IPv4 route while running OSPF between PE-CE?

  A. OSPF domain identifier
  B. OSPF route type
  C. OSPF router ID
  D. MED
  E. OSPF network type
  E. OSPF network type

  ---

  By process of elimination, from RFC 4577:

  For every address prefix that was installed in the VRF by one of its associated OSPF instances, the PE must create a VPN-IPv4 route in BGP. Each such route will have some of the following Extended Communities attributes:

  ?The OSPF Domain Identifier Extended Communities attribute. If the OSPF instance that installed the route has a non-NULL primary Domain Identifier, this MUST be present; if that OSPF instance has only a NULL Domain Identifier, it MAY

  be omitted. ?OSPF Route Type Extended Communities Attribute. This attribute MUST be present. It is encoded with a two-byte type field, and its type is 0306. ?OSPF Router ID Extended Communities Attribute. This OPTIONAL attribute

  specifies the OSPF Router ID of the system that is identified in the BGP Next Hop attribute. More precisely, it specifies the OSPF Router Id of the PE in the OSPF instance that installed the route into the VRF from which this route was

  exported. ?MED (Multi_EXIT_DISC attribute). By default, this SHOULD be set to the value of the OSPF distance associated with the route, plus 1.

  Reference: https://tools.ietf.org/html/rfc4577

• Question 179:

  Refer to the exhibit.

  

  Which two benefits result from using this command on a switch? (Choose two.)

  A. The port cannot forward unknown unicast packets.
  B. Network security is increased on the configured port.
  C. The port cannot forward unknown multicast packets.
  D. The port cannot forward unknown broadcast packets.
  E. Network security is increased on all ports of the switch.
  F. Unknown packets of all types, except unicast, are blocked.
  A. The port cannot forward unknown unicast packets.
  B. Network security is increased on the configured port.

• Question 180:

  

  Refer to the exhibit.

  What is wrong with the configuration of the tunnel interface of this DMVPN Phase II spoke router?

  A. The interface MTU is too high.
  B. The tunnel destination is missing.
  C. The NHRP NHS IP address is wrong.
  D. The tunnel mode is wrong.
  D. The tunnel mode is wrong.

  ---

  By default, tunnel interfaces use GRE as the tunnel mode, but a DMVPN router needs to be configured for GRE multipoint by using the "tunnel mode gre multipoint" interface command.