Cisco 642-902 Online Practice Questions and Exam Preparation

Cisco 642-902 Online Questions & Answers

• Question 341:

  A router is configured for redistribution to advertise EIGRP routes into OSPF on a boundary router. Given the configuration: router ospf 1 redistribute eigrp 1 metric 25 subnets

  What is the function of the 25 parameter in the redistribute command?

  A. It specifies the seed cost to be applied to the redistributed routes.
  B. It specifies the administrative distance on the redistributed routes.
  C. It specifies the metric limit of 25 subnets in each OSPF route advertisement.
  D. It specifies a new process-id to inject the EIGRP routes into OSPF.
  A. It specifies the seed cost to be applied to the redistributed routes.

  ---

  Reference:

  http://www.hh.se/download/18.1a63903b12e0cb97563800024/1297326173185/Manipulating +Routing+Updates.pdf (slide 25, configuring redistribution)

• Question 342:

  Refer to the exhibit.

  

  On the basis of the partial configuration, which two statements are correct? (Choose two.)

  A. Only routes matching 10.0.1.0/24 will be advertised out Ethernet 0.
  B. Only routes 10.0.1.0/24 will be sent out all interfaces.
  C. Only routes 10.0.1.0/24 will be allowed in the routing table.
  D. Only routes matching 10.0.0.0/8 will be advertised out Ethernet 0.
  E. Only routes matching 10.0.0.0/8 will be advertised out interfaces other than Ethernet 0.
  F. All routes will be advertised out interfaces other than Ethernet 0.
  A. Only routes matching 10.0.1.0/24 will be advertised out Ethernet 0.
  E. Only routes matching 10.0.0.0/8 will be advertised out interfaces other than Ethernet 0.

  ---

  In this case, the following algorithm is used when multiple distribute-lists are used:

  1.

  First check which interface is being sent out. If it is Ethernet 0, distribute-list 2 is applied first. If the network is denied then no further checking is done for this network. But if distribute-list 2 permits that network then distribute-list 1 is also checked. If both distribute- lists allow that network then it will be sent out.

  2.

  If the interface is not Ethernet 0 then only distribute-list 1 is applied.

  Now let's take some examples.

  +

  If the advertised network is 10.0.1.0/24, it will be sent out all interfaces, including Ethernet 0. + If the advertised network is 10.0.2.0/24, it will be sent out all interfaces, excepting Ethernet 0.

  +

  If the advertised network is 11.0.0.0/8, it will be dropped.

  Note: It is possible to define one interface-specific distribute-list per interface and one protocol-specific distribute-list for each process/autonomous- system.

  (For more information, please read: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080208748.shtml)

• Question 343:

  In IPv6, the interfaces running OSPF can be configured with multiple address prefixes.

  Which statement is true about the IPv6 addresses that can be included into the OSPF process?

  A. Specific addresses cannot be selected for importation into the OSPF process.
  B. Specific addresses can be selected using an ACL.
  C. Specific addresses can be selected using a route map.
  D. Specific addresses can be selected using a prefix list.
  A. Specific addresses cannot be selected for importation into the OSPF process.

  ---

  http://www.6deploy.eu/workshops/kenya_20080617/IPv6%20Routing_OSPFv3_MP- BGP.pdf (slide 20, 3rd bullet)

• Question 344:

  When policy-based routing (PBR) is being configured,

  

  Which three criteria can the set command specify? (Choose three.)

  A. all interfaces through which the packets can be routed
  B. all interfaces in the path toward the destination
  C. adjacent next hop router in the path toward the destination
  D. all routers in the path toward the destination
  E. all networks in the path toward the destination
  F. type of service and precedence in the IP packets
  A. all interfaces through which the packets can be routed
  C. adjacent next hop router in the path toward the destination
  F. type of service and precedence in the IP packets

  ---

  Configuring Policy-Based Routing (PBR):

  You can configure PBR by following these steps. Some of the steps may be omitted depending on your application for PBR. For this example, note the set condition options listed is step 3 (answers are bolded).

  Step1 Define and configure the route map needed for the policy. This is accomplished with the route-map command, as discussed previously. Step2 Define and configure the match statements the route map will use. The most common match

  statements used are the following:

  match ip address [access-list number]

  The match ip address is used to call a standard, extended, or expanded-range ACL. match length [min_packet_length_0-2147483647] [max_packet_length_0-2147483647] The match length is used to match the Layer 3 packet length, in

  bytes, with all associated headers and trailers included. You must enter the minimum and maximum packet length. Use the match length command to policy route traffic based on packet size. You can deploy this to route traffic with large or small packet sizes to specific areas of the network. Step3 Configure and define the new routing policy with set commands. Multiple set commands may be used; if multiple commands are used, they are executed in the following order: set ip {precedence [value_0-7 | name] | tos [value_0-8 | name]} set ip next-hop ip_address set interface interface_name set ip default next-hop ip_address set default interface interface_name Set ip precedence {[1-7]|[routine|critical|flash|flash-override|immediate|internet| network|priority]}

  Reference: http://www.ciscopress.com/articles/article.asp?p=102092andrl=1

• Question 345:

  Refer to the exhibit.

  

  Which statement is correct regarding the operation of NAT-PT between the IPv4 and IPv6 networks shown?

  A. The router will determine the IPv4 destination address.
  B. The source IPv6 host can use DNS to determine the IPv6-to-IPv4 address mapping.
  C. The host is statically configured with the IPv6-to-IPv4 address mapping.
  D. ICMP can be used to determine the IPv6-to-IPv4 address mapping.
  B. The source IPv6 host can use DNS to determine the IPv6-to-IPv4 address mapping.

• Question 346:

  Refer to the exhibit.

  

  You are the network administrator responsible for the NProuter, the 10.1.1.1 router, and the 10.1.1.2 router. What can you determine about the OSPF operations from the debug output?

  A. The NProuter has two OSPF neighbors in the "Full" adjacency state.
  B. The NProuter serial0/0 interface has the OSPF dead timer set to 10 seconds.
  C. The NProuter serial0/0 interface has been configured with an OSPF network type of "pointto-point".
  D. The 10.1.1.1 and 10.1.1.2 routers are not using the default OSPF dead and hello timers setting.
  E. The "Mismatched" error is caused by the expiration of the OSPF timers.
  B. The NProuter serial0/0 interface has the OSPF dead timer set to 10 seconds.

  ---

  First we should understand clearly about the line Dead R 120 C 10, Hello R 30 C 30 The "R" here means "Received" and "C" means "Configured". In other words, "Dead R" is the Dead Timer Received from the neighbor and the "Dead C" is the Dead Timer of the local router. Therefore in this case "Dead R 120 C 10 means the Death Timer of the neighbor is 120 seconds while the local Dead Timer is 10 seconds, which causes a mismatch. Also we can learn that the local OSPF dead timer is set to 10 seconds. For your information, by default, OSPF uses a 10-second hello timer and 40-second hold timer on broadcast and point-to-point links, and a 30-second hello timer and 120-second hold timer for all other network types.

• Question 347:

  Identify three characteristics of EIGRP feasible successors? (Choose three.)

  A. A feasible successor is selected by comparing the advertised distance of a non-successor route to the feasible distance of the best route.
  B. If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor.
  C. If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route.
  D. The feasible successor can be found in the routing table.
  E. Traffic will be load balanced between feasible successors with the same advertised distance.
  A. A feasible successor is selected by comparing the advertised distance of a non-successor route to the feasible distance of the best route.
  B. If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor.
  C. If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route.

  ---

  Reference: http://packetlife.net/blog/2010/aug/9/eigrp-feasible-successor-routes/

• Question 348:

  The Cisco SA 500 Series Security Appliances are built specifically for businesses with less than 100 employees. What are three important benefits of this device? (Choose three)

  A. business-grade firewall
  B. premium support via SMART net
  C. site-to-site VPN for remote offices
  D. Cisco IOS software-based
  E. email security
  F. XML support
  A. business-grade firewall
  C. site-to-site VPN for remote offices
  E. email security

  ---

  Reference:

  http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps9932/at_a_glance_c4 5-562587.pdf (Page 1, see key features and benefits)

• Question 349:

  The maximum number of routers per OSPF area typically depends on which three factors? (Choose three.)

  A. the kind of OSPF areas being implemented
  B. the number of external LSAs in the network
  C. the number of DRs and BDRs in the areas
  D. the number of virtual links in the areas
  E. how well the areas can be summarized
  F. the use of LSA filters
  A. the kind of OSPF areas being implemented
  B. the number of external LSAs in the network
  E. how well the areas can be summarized

  ---

  Reference: https://www.google.com/url?

  sa=tandrct=jandq=andesrc=sandsource=webandcd=6andcad=rjaandved=0CFwQFjAFandurl=http%3A %2F%2Ffaculty.valenciacollege.edu%2Fwyousif%2FCCNP% 2FSemester5%2FPresentations %

  2FMAOSPF_P2.pptandei=VUurUbmOA9OThgeDhYDoCgandusg=AFQjCNE5mLCAUlWC zou_vUX_DGhOOwcYxwandsig2=_7fgBDpXZCFi0Tay60wYmwandbvm=bv.47244034,d.ZG 4 (Slide 85)

• Question 350:

  Which BGP attribute will not be advertised in routing updates to its neighboring routers? Select the best response

  A. weight
  B. local preference
  C. origin
  D. AS_path
  E. next hop
  A. weight

  ---

  The weight attribute is a Cisco proprietary technology. This attribute is local to a router and is not advertised to neighboring routers. If the router learns about more than one route to the same destination, the route with the highest weight will be preferred and will be installed in the routing table. By default, the value of weight is 0 and the range is from 0 to 65535. The route with the highest weight will be installed in the IP routing table.