Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 621:

  Refer to the exhibit.

  

  What is the polling frequency set by this configuration?

  A. 60 seconds
  B. 10 seconds
  C. 360 seconds
  D. 60 milliseconds
  E. 10 milliseconds
  A. 60 seconds

  ---

  The frequency value lists the polling interval, in seconds.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla- 15-mt-book/sla_icmp_echo.html

• Question 622:

  Into which two pieces of information does the LISP protocol split the device identity? (Choose two.)

  A. Routing Locator
  B. Endpoint Identifier
  C. Resource Location
  D. Enterprise Identifier
  E. LISP ID
  F. Device ID
  A. Routing Locator
  B. Endpoint Identifier

• Question 623:

  Which BGP attribute is used to influence inbound traffic?

  A. weight
  B. origin
  C. multi-exit discriminator
  D. local preference
  C. multi-exit discriminator

• Question 624:

  Which bit should be set in the link-state PDU of an IS-IS L1/L2 router to indicate that it is a potential exit point of the area?

  A. the ABR bit
  B. the ATT bit
  C. the down bit
  D. the P bit
  B. the ATT bit

  ---

  Default routing is achieved in two distinct ways with Integrated IS-IS: ? Attached bit--Set by a Level 1/Level 2 router in its own Level 1 LSP and used to indicate to all Level 1 routers (within the area) that this router is a potential exit point of the area. Level 1-only routers will default to the nearest attached Level 2 router. ? Default information originate--Can be configured in Level 1 as well as Level 2. The default route (0.0.0.0/0) is inserted in the router LSP (Level 1 or Level 2, according to the configuration command) and the LSP is flooded according to the router type (Level 1 or Level 2). A Level 2 router doesn't need to have a default route to originate a default route.

  Reference: http://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a3e6f.sh tml

• Question 625:

  Which three capabilities are provided by MLD snooping? (Choose three.)

  A. dynamic port learning
  B. IPv6 multicast router discovery
  C. user-configured ports age out automatically
  D. a 5-minute aging timer
  E. flooding control packets to the egress VLAN
  F. a 60-second aging timer
  A. dynamic port learning
  B. IPv6 multicast router discovery
  D. a 5-minute aging timer

  ---

  Like IGMP snooping, MLD snooping performs multicast router discovery, with these characteristics:

  ?Ports configured by a user never age out.

  ?Dynamic port learning results from MLDv1 snooping queries and IPv6 PIMv2 packets. ?If there are multiple routers on the same Layer 2 interface, MLD snooping tracks a single multicast router on the port (the router that most recently sent a

  router control packet). ?Dynamic multicast router port aging is based on a default timer of 5 minutes; the multicast router is deleted from the router port list if no control packet is received on the port for 5 minutes. ?IPv6 multicast router

  discovery only takes place when MLD snooping is enabled on the switch.

  Reference:

  https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12- 2_55_se/configuration/guide/scg3750/swv6mld.pdf

• Question 626:

  Which two statements about VRF-lite are true? (Choose two)

  A. It can increase the packet switching rate.
  B. It supports most routing protocols, including EIGRP, ISIS, and OSPF.
  C. It supports MPLS-VRF label exchange and labeled packets.
  D. It should be used when a customer's router is connected to an ISP over OSPF.
  E. It can support multiple customers on a single switch.
  D. It should be used when a customer's router is connected to an ISP over OSPF.
  E. It can support multiple customers on a single switch.

• Question 627:

  Which protocol will accept incoming updates when the passive-interface command is configured?

  A. OSPF
  B. IS-IS
  C. RIP
  D. EIGRP
  C. RIP

• Question 628:

  Which statement about the VLAN database is true?

  A. Manually deleting the vlan.dat file can cause inconsistency in the database.
  B. Private VLAN information is stored in the database.
  C. VLAN configurations 1 through 4096 are stored in the vlan.dat file.
  D. The VLAN database is used only if the VTP domain name in the VLAN database matches the VTP domain name in the startup-config file.
  A. Manually deleting the vlan.dat file can cause inconsistency in the database.

• Question 629:

  Refer to the exhibit.

  

  Which statement is true?

  A. The command ip multicast rpf multitopology is missing from the configuration.
  B. Multitopology routing for multicast has been enabled for IS-IS.
  C. This output is invalid.
  D. The command mpls traffic-eng multicast-intact is configured on this router.
  B. Multitopology routing for multicast has been enabled for IS-IS.

  ---

  The following is sample output from the show ip rpf command in a Multi-Topology Routing (MTR) routing environment. In Cisco IOS releases that support MTR, the "RPF topology" field was introduced to indicate which RIB topology is being

  used for the RPF lookup. For the "RPF topology" field in this example, the first topology listed (ipv4 multicast base) indicates where the nexthop of the RPF lookup is being conducted and the second topology listed (ipv4 unicast data) indicates

  where the route originated from.

  Router# show ip rpf 10.30.30.32

  RPF information for ? (10.30.30.32)

  RPF interfacE. Ethernet1/0

  RPF neighbor: ? (10.1.1.32)

  RPF route/mask: 10.30.30.32/32

  RPF typE. unicast (ospf 100)

  Doing distance-preferred lookups across tables

  RPF topology: ipv4 multicast base, originated from ipv4 unicast data

  The table below describes the fields shown in the displays.

  Table 15 show ip rpf Field Descriptions

  Field

  Description

  RPF information for

  Hostname and source address for which RPF information is displayed.

  RPF interface

  For the given source, the interface from which the router expects to receive packets.

  RPF neighbor

  For the given source, the neighbor from which the router expects to receive packets.

  RPF route/mask

  Route number and mask that matched against this source.

  RPF type

  Routing table from which this route was obtained, either unicast, MBGP, DVMRP, or static mroutes.

  RPF recursion count

  The number of times the route is recursively resolved.

  Doing distance-preferred

  Whether RPF was determined based on distance or length of mask.

  Using Group Based VRF Select, RPF VRF.

  The RPF lookup was based on the group address and the VRF where the RPF lookup is being performed.

  Metric preference

  The preference value used for selecting the unicast routing metric to the RP announced by the designated forwarder (DF).

  Metric

  Unicast routing metric to the RP announced by the DF.

  RPF topology

  RIB topology being used for the RPF lookup, and, if originated from a different RIB topology, which RIB topology the route originated from.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-xe-3se- 5700-cr-book/imc-xe-3se-3850-cr-book_chapter_010.html

• Question 630:

  Which mechanism does Cisco recommend for CE router interfaces that face the service provider for an EVPL circuit with multiple EVCs and multiple traffic classes?

  A. HCBWFQ
  B. LLQ
  C. tail drop
  D. WRED
  A. HCBWFQ

  ---

  In a simple handoff, packets may be discarded in the service provider network, either because of congestion on a link without an appropriate QoS policy or because of a policer QoS configuration on the service provider network that serves to

  rate limit traffic accessing the WAN core. To address these issues, QoS on the CE device is applied at a per-port level. A QoS service policy is configured on the outside Ethernet interface, and this parent policy includes a shaper that then

  references a second or subordinate (child) policy that enables queueing within the shaped rate. This is called a hierarchical CBWFQ (HCBWFQ) configuration.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/Ethernet_Acces s_for_NG_MAN_WAN_V3-1_external.html