Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 291:

  Which cache aggregation scheme is supported by NetFlow ToS-based router aggregation?

  A. prefix-port
  B. AS
  C. protocol port
  D. destination prefix
  A. prefix-port

• Question 292:

  Refer to the exhibit.

  

  Which LISP component do routers in the public IP network use to forward traffic between the two networks?

  A. EID
  B. RLOC
  C. map server
  D. map resolver
  B. RLOC

  ---

  Locator ID Separation Protocol (LISP) is a network architecture and protocol that implements the use of two namespaces instead of a single IP address:

  Endpoint identifiers (EIDs)--assigned to end hosts. Routing locators (RLOCs)--assigned to devices (primarily routers) that make up the global routing system. The public networks use the RLOC to forward traffic between networks.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_lisp/configuration/15- mt/irl-15-mt-book/irl-overview.html

• Question 293:

  Which two factors can reduce NBAR2 performance? (Choose two)

  A. queuing
  B. multiple NBAR2-enabled interfaces
  C. slow link speeds
  D. stateful protocol matches
  E. short-duration flows
  D. stateful protocol matches
  E. short-duration flows

• Question 294:

  Which statement is true about MLD?

  A. MLD v1 gives hosts the ability to receive multicast packets from specific source addresses.
  B. All MLD messages are sent with a link-local IPv6 source address of FF02::D.
  C. The multicast address field is cleared to zero when sending an MLD report message.
  D. MLD is used by IPv6 routers to discover multicast listeners on a directly attached link.
  D. MLD is used by IPv6 routers to discover multicast listeners on a directly attached link.

  ---

  IPv6 Multicast Listener Discovery (MLD) is used by IPv6 devices to discover multicast listeners (nodes that want to receive multicast packets destined for specific multicast addresses) on directly attached links. There are two versions of MLD. MLD version 1 is based on version 2 of the IGMP for IPv4, and MLD version 2 is based on version 3 of the IGMP for IPv4. IPv6 multicast for Cisco software uses both MLD version 2 and MLD version 1.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_lsm/configuration/xe- 3s/imc-lsm-xe-3s-book/ipv6-mcast-mld-xe.html

• Question 295:

  Refer to the exhibit.

  

  Router 1 and Router 2 use HSRP to provide first hop redundancy for hosts on the 10.1.2.0/24 network. Which feature can provide additional failover coverage for the PC?

  A. Cisco Express Forwarding
  B. NetFlow
  C. Accounting
  D. Enhanced Object Tracking
  D. Enhanced Object Tracking

  ---

  HSRP has a mechanism for tracking the interface line-protocol state. The enhanced object tracking feature separates the tracking mechanism from HSRP. It creates a separate, standalone tracking process that can be used by processes

  other than HSRP. This feature allows tracking of other objects in addition to the interface line-protocol state. A client process, such as HSRP, can register an interest in tracking objects and request notification when the tracked object changes

  state. Several clients can track the same object, and can take different actions when the object changes state. This feature increases the availability and speed of recovery of a router system and decreases outages and outage duration.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/blades/3040/software/release/12- 2_44_se/configuration/guide/swhsrp.html#wp1083927

• Question 296:

  Which two parameters does the Tunnel Mode Auto Selection feature select automatically? (Choose two.)

  A. the tunneling protocol
  B. the transport protocol
  C. the ISAKMP profile
  D. the transform-set
  E. the tunnel peer
  A. the tunneling protocol
  B. the transport protocol

  ---

  The Tunnel Mode Auto Selection feature eases the configuration and spares you about knowing the responder's details. This feature automatically applies the tunneling protocol (GRE or IPsec) and transport protocol (IPv4 or IPv6) on the virtual template as soon as the IKE profile creates the virtual access interface. This feature is useful on dual stack hubs aggregating multivendor remote access, such as Cisco AnyConnect VPN Client, Microsoft Windows7 Client, and so on.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios- xml/ios/sec_conn_vpnips/configuration/xe-3s/sec-sec-for-vpns-w-ipsec-xe-3s-book/sec- ipsec-virt-tunnl.html

• Question 297:

  Which packet does a router receive if it receives an OSPF type 4 packet?

  A. hello packet
  B. database descriptor packet
  C. link state update packet
  D. link state request packet
  E. link state acknowledge packet
  C. link state update packet

• Question 298:

  Refer to the exhibit.

  

  Which command is configured on this router?

  A. bgp update-delay 60
  B. neighbor 10.100.1.1 maximum-prefix 200
  C. neighbor 10.100.1.1 maximum-path 2
  D. neighbor 10.100.1.1 ebgp-multihop 2
  B. neighbor 10.100.1.1 maximum-prefix 200

  ---

  The BGP Maximum-Prefix feature allows you to control how many prefixes can be received from a neighbor. By default, this feature allows a router to bring down a peer when the number of received prefixes from that peer exceeds the configured Maximum-Prefix limit. This feature is commonly used for external BGP peers, but can be applied to internal BGP peers also. When the maximum number of prefixes has been received, the BGP sessions closes into the IDLE state.

  Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol- bgp/25160-bgp-maximum-prefix.html

• Question 299:

  Refer to the exhibit.

  

  Which two technologies allow the Host MAC address to be visible to Host A? (Choose two)

  A. L2TPv3
  B. AToM
  C. MPLS Layer 3 VPN
  D. GRE tunneling
  E. LISP tunneling
  F. 802.3ad
  A. L2TPv3
  B. AToM

• Question 300:

  What is the function of the command ip pim autorp listener?

  A. It allows a border PIM sparse mode router to accept autorp information from another autonomous system.
  B. It allows the mapping agents to accept autorp information from the PIM rendezvous point.
  C. It allows the routers to flood the autorp information in a sparse-mode-only network.
  D. It allows a BSR to accept autorp information and translate it into BSR messages.
  C. It allows the routers to flood the autorp information in a sparse-mode-only network.

  ---

  To cause IP multicast traffic for the two Auto-RP groups 224.0.1.39 and 224.0.1.40 to be Protocol Independent Multicast (PIM) dense mode flooded across interfaces operating in PIM sparse mode, use the ip pim autorp listener command in global configuration mode. To disable this feature, use the no form of this command.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-cr- book/imc_i3.html#wp3085748429