Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 911:

  Refer to the exhibit.

  

  If the network switch is configured as shown, which two statements about network traffic are true? (Choose two.)

  A. Traffic enters the shaper on a FIFO basis.
  B. Traffic enters the shaper on a weighted fair queueing basis.
  C. Drop behavior is random for traffic in excess of 6 Mbps.
  D. Voice traffic is given priority until it reaches 1.5 Mbps.
  E. Voice traffic is given priority until it reaches 6 Mbps.
  A. Traffic enters the shaper on a FIFO basis.
  D. Voice traffic is given priority until it reaches 1.5 Mbps.

  ---

  A. Serial interfaces at E1 (2.048 Mbps) and below use weighted fair queueing (WFQ) by default. Other interfaces use first-in first-out (FIFO) by default. D. Voice traffic is given priority up to 25% of the shape average value, which is 6000000, so 25% of 6 Mbps is 1.5 Mbps.

• Question 912:

  Which statement describes the difference between a stub area and a totally stub area?

  A. The ABR advertises a default route to a totally stub area and not to a stub area.
  B. Stub areas do not allow LSA types 4 and 5, while totally stub areas do not allow LSA types 3, 4, and 5.
  C. Totally stub areas allow limited external routes in the area via a special type 7 LSA, while stub areas do not.
  D. Stub areas do not allow external LSAs, ASBR summary LSAs, or summary LSAs with the exception of a default route originated by the ABR via a summary LSA.
  B. Stub areas do not allow LSA types 4 and 5, while totally stub areas do not allow LSA types 3, 4, and 5.

  ---

  Standard areas can contain LSAs of type 1, 2, 3, 4, and 5, and may contain an ASBR. The backbone is considered a standard area. Stub areas can contain type 1, 2, and 3 LSAs. A default route is substituted for external routes. Totally

  stubby areas can only contain type 1 and 2 LSAs, and a single type 3 LSA. The type 3 LSA describes a default route, substituted for all external and inter- area routes.

  Not-so-stubby areas implement stub or totally stubby functionality yet contain an ASBR. Type 7 LSAs generated by the ASBR are converted to type 5 by ABRs to be flooded to the rest of the OSPF domain.

  Reference: http://packetlife.net/blog/2008/jun/24/ospf-area-types/

• Question 913:

  What are two requirements for NSF operation in an MPLS L3 VPN? (Choose Two)

  A. Graceful restart must be configured in LDP.
  B. Stateful HA must be deployed.
  C. ISSU must be active.
  D. Graceful restart must be configured in BGP.
  E. SSO must be active.
  F. Tha NSF must be configured for Layer 2 traffic.
  A. Graceful restart must be configured in LDP.
  B. Stateful HA must be deployed.

• Question 914:

  Which three statements about implementing an application layer gateway in a network are true? (Choose three.)

  A. It allows client applications to use dynamic ports to communicate with a server regardless of whether NAT is being used.
  B. It maintains granular security over application-specific data.
  C. It allows synchronization between multiple streams of data between two hosts.
  D. Application layer gateway is used only in VoIP/SIP deployments.
  E. Client applications require additional configuration to use an application layer gateway.
  F. An application layer gateway inspects only the first 64 bytes of a packet before forwarding it through the network.
  A. It allows client applications to use dynamic ports to communicate with a server regardless of whether NAT is being used.
  B. It maintains granular security over application-specific data.
  C. It allows synchronization between multiple streams of data between two hosts.

  ---

  An ALG may offer the following functions: allowing client applications to use dynamic ephemeral TCP/ UDP ports to communicate with the known ports used by the server applications, even though a firewall configuration may allow only a limited number of known ports. In the absence of an ALG, either the ports would get blocked or the network administrator would need to explicitly open up a large number of ports in the firewall -- rendering the network vulnerable to attacks on those ports. converting the network layer address information found inside an application payload between the addresses acceptable by the hosts on either side of the firewall/NAT. This aspect introduces the term 'gateway' for an ALG. recognizing application-specific commands and offering granular security controls over them synchronizing between multiple streams/sessions of data between two hosts exchanging data. For example, an FTP application may use separate connections for passing control commands and for exchanging data between the client and a remote server. During large file transfers, the control connection may remain idle. An ALG can prevent the control connection getting timed out by network devices before the lengthy file transfer completes.

  Reference: http://en.wikipedia.org/wiki/Application-level_gateway

• Question 915:

  Which three options are sources from which a SPAN session can copy traffic? (Choose three.)

  A. ports
  B. EtherChannels
  C. VLANs
  D. subnets
  E. primary IP addresses
  F. secondary IP addresses
  A. ports
  B. EtherChannels
  C. VLANs

  ---

  SPAN Sources The interfaces from which traffic can be monitored are called SPAN sources. Sources designate the traffic to monitor and whether to copy ingress, egress, or both directions of traffic. SPAN sources include the following: ?

  Ethernet ports

  ?

  Port channels ?

  The inband interface to the control plane CPU -- You can monitor the inband interface only from the default VDC. Inband traffic from all VDCs is monitored.

  ?

  VLANs -- When a VLAN is specified as a SPAN source, all supported interfaces in the VLAN are SPAN sources.

  ?

  Remote SPAN (RSPAN) VLANs

  ?

  Fabric port channels connected to the Cisco Nexus 2000 Series Fabric Extender ?

  Satellite ports and host interface port channels on the Cisco Nexus 2000 Series Fabric Extender -- These interfaces are supported in Layer 2 access mode, Layer 2 trunk mode, and Layer 3 mode.

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx- os/system_management/configuration/guide/sm_nx_os_cg/ sm_14span.html#wp1239492

• Question 916:

  Which three statements about SPAN traffic monitoring are true? (Choose three.)

  A. Traffic from a non-source VLAN is discarded when it arrives on a source VLAN.
  B. Multiple sessions can send traffic to an individual destination port.
  C. It supports up to 32 SPAN ports per switch.
  D. The destination port acts as a normal switchport.
  E. It supports up to 64 SPAN ports per switch.
  F. Only one session can send traffic to an individual destination port.
  A. Traffic from a non-source VLAN is discarded when it arrives on a source VLAN.
  E. It supports up to 64 SPAN ports per switch.
  F. Only one session can send traffic to an individual destination port.

  ---

  You can create up to a total of 64 SPAN and ERSPAN sessions to define sources and destinations on the local device.You can also create a SPAN session to monitor multiple VLAN sources and choose only VLANs of interest to transmit on

  multiple destination ports. For example, you can configure SPAN on a trunk port and monitor traffic from different VLANs on different destination ports.

  You can configure a particular destination port in only one SPAN session. Traffic from a non-source VLAN is discarded when it arrives on a source VLAN.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0/troubleshooti ng/configuration/guide/n1000v_troubleshooting/trouble_15span.html

• Question 917:

  Refer to the exhibit.

  

  Which two statements about the given NetFlow configuration are true?(Choose two)

  A. It supports a maximum of 2048 entries
  B. It supports only IPv4 flows
  C. It supports both IPv4 and IPv6 flows
  D. It supports only IPv6 flows
  E. It uses the default port to send flows to the exporter
  A. It supports a maximum of 2048 entries
  B. It supports only IPv4 flows

• Question 918:

  Refer to the exhibit.

  

  Which statement about the debug behavior of the device is true?

  A. The device debugs all IP events for 172.16.129.4.
  B. The device sends all debugging information for 172.16.129.4.
  C. The device sends only NTP debugging information to 172.16.129.4.
  D. The device sends debugging information every five seconds.
  A. The device debugs all IP events for 172.16.129.4.

  ---

  This is an example of a conditional debug, where there is a single condition specified of IP address 172.16.129.4. So, all IP events for that address will be output in the debug.

• Question 919:

  DRAG DROP

  Drag and drop the Metro Ethernet circuit on the left to the corresponding Service Type category on the right.

  Select and Place:

  

  

• Question 920:

  Which two values must be identical to allow IS-IS devices to become neighbors? (Choose two.)

  A. interface MTU
  B. authentication key
  C. IP MTU
  D. CLNS address
  E. NSEL
  F. area ID
  A. interface MTU
  B. authentication key