Free Download Cisco 350-001 VCE Test Engine Full Version Now (51-60)
QUESTION 51
What is the flooding scope of an OSPFv3 LSA, if the value of the S2 bit is set to 1 and the S1 bit is set to 0?
A. link local
B. area wide
C. AS wide
D. reserved
Answer: C
Explanation:
The Type 1 router LSA is now link local and the Type 2 Network LSA is AS Wide S2 and S1 indicate the LSA’s flooding scope. Table 9-1 shows the possible values of these two bits and the associated flooding scopes.
Table 9-1 S bits in the OSPFv3 LSA Link State Type field and their associated flooding scopes
LSA Function Code, the last 13 bits of the LS Type field, corresponds to the OSPFv2 Type field. Table 9-2 shows the common LSA types used by OSPFv3 and the values of their corresponding LS Types. If you decode the hex values, you will see that the default U bit of all of them is 0. The S bits of all LSAs except two indicate area scope. Of the remaining two, AS External LSAs have an AS flooding scope and Link LSAs have a linklocal flooding scope. Most of the OSPFv3 LSAs have functional counterparts in OSPFv2; these OSPFv2 LSAs and their types are also shown in Table 9-2. Table 9-2 OSPFv3 LSA types and their OSPFv2 counterparts
http://www.networkworld.com/subnets/cisco/050107-ch9-ospfv3.html?page=1
QUESTION 52
How will EIGRPv6 react if there is an IPv6 subnet mask mismatch between the Global Unicast
addresses on a point-to-point link?
A. EIGRPv6 will form a neighbor relationship.
B. EIGRPv6 will not form a neighbor relationship.
C. EIGRPv6 will form a neighbor relationship, but with the log MSG: “EIGRPv6 neighbor not on a
common subnet.”
D. EIGRPv6 will form a neighbor relationship, but routes learned from that neighbor will not be
installed in the routing table.
Answer: A
Answer: A
Explanation:
http://www.ietf.org/rfc/rfc3587.txt
QUESTION 53
Which two tunneling techniques support IPv6 multicasting? (Choose two.)
A. 6to4
B. 6over4
C. ISATAP
D. 6PE
E. GRE
Answer: BE
Explanation:
When IPv6 multicast is supported (over a 6to4 tunnel), an IPv6 multicast routing protocol must be used
Restrictions for Implementing IPv6 Multicast
IPv6 multicast for Cisco IOS software uses MLD version 2. This version of MLD is fully backward- compatible with MLD version 1 (described in RFC 2710). Hosts that support only MLD version 1 will interoperate with a router running MLD version 2. Mixed LANs with both MLD version 1 and MLD version 2 hosts are likewise supported.
IPv6 multicast is supported only over IPv4 tunnels in Cisco IOS Release 12.3(2)T, Cisco IOS Release 12.2
(18)S, and Cisco IOS Release 12.0(26)S.
When the bidirectional (bidir) range is used in a network, all routers in that network must be able to understand the bidirectional range in the bootstrap message (BSM). IPv6 multicast routing is disabled by default when the ipv6 unicast-routing command is configured. On Cisco Catalyst 6500 and Cisco 7600 series routers, the ipv6 multicast-routing also must be enabled in order to use IPv6 unicast routing
http://www.cisco.com/web/about/ac123/ac147/ac174/ac197/about_cisco_ipj_archive_article09186a00800c830a.html
http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6-multicast.html https://supportforums.cisco.com/thread/183386
QUESTION 54
Which two OSPF LSA types are new in OSPF version 3? (Choose two.)
A. Link
B. NSSA external
C. Network link
D. Intra-area prefix
E. AS domain
Answer: AD
Explanation:
New LSA Types
OSPFv3 carries over the seven basic LSA types we’re familiar with from OSPFv2. However, the type 1 and 2 LSAs have been re-purposed, as will be discussed in a bit. OSPFv3 also introduces two new LSA types: Link and Intra-area Prefix.
http://packetlife.net/blog/2010/mar/2/ospfv2-versus-ospfv3/
QUESTION 55
Refer to the exhibit. How will traffic be split between the routers, assuming that there are many hosts on this subnet?
A. All traffic will be sent to the primary router (10.1.1.100).
B. Traffic will be split equally between the two routers (10.1.1.100 and 10.1.1.101).
C. Traffic will be split 25% (10.1.1.101) / 75% (10.1.1.100) between the two routers.
D. Traffic will be split 75% (10.1.1.101) / 25% (10.1.1.100) between the two routers.
Answer: D
Explanation:
http://en.wikipedia.org/wiki/Gateway_Load_Balancing_Protocol http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6550/prod_presentation0900aecd801790a3_ps6600_Products_Presentation.html http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6554/ps6600/product_data_sheet0900aecd803a546c.html
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1027129
QUESTION 56
Refer to the exhibit. A packet from RTD with destination RTG, is reaching RTB. What is the path this packet will take from RTB to reach RTG?
A. RTB – RTA – RTG
B. RTB – RTD – RTC – RTA – RTG
C. RTB – RTF – RTE – RTA – RTG
D. RTB will not be able to reach RTG since the OSPF configuration is wrong.
Answer: C
Explanation:
NOTE: I strongly suspect this question is wrong. There is no way to find the destination without additional information. So this is a wrong question. The exhibit doesn’t provide enough information to calculate the path of the packet
QUESTION 57
Refer to the exhibit. Which path is selected as best path?
A. path 1, because it is learned from IGP
B. path 1, because the metric is the lowest
C. path 2, because it is external
D. path 2, because it has the higher router ID
Answer: B
Explanation:
Metrics is a property of a route in computer networking, consisting of any value used by a routing protocol to determine whether one particular route should be chosen over another. The routing table stores only the best possible routes, while link-state or topological databases may store all other information as well. For example, Routing Information Protocol uses hopcount (number of hops) to determine the best possible route. The route will go in the direction of the gateway with the lowest metric (default gateway).
http://en.wikipedia.org/wiki/Metrics_(networking)
QUESTION 58
What action will a BGP route reflector take when it receives a prefix marked with the community
attribute NO ADVERTISE from a client peer?
A. It will advertise the prefix to all other client peers and non-client peers.
B. It will not advertise the prefix to EBGP peers.
C. It will only advertise the prefix to all other IBGP peers.
D. It will not advertise the prefix to any peers.
Answer: D
Explanation:
BGP requires that all BGP peers in the same autonomous system form an iBGP session with all peers in the autonomous system. This is too difficult in many environments. Route reflectors are fully functional iBGP speakers that form iBGP sessions with other iBGP speakers, and they also perform a second function – they forward routes from other iBGP speakers to route reflector clients. The route reflector clients and clients form a cluster.
QUESTION 59
Refer to the exhibit. R1 is not learning about the 172.16.10.0 subnet from the BGP neighbor R2 (209.165.202.130). What can be done so that R1 will learn about this network?
A. Disable auto-summary on R2.
B. Configure an explicit network command for the 172.16.10.0 subnet on R2.
C. Subnet information cannot be passed between IBGP peers.
D. Disable auto-summary on R1.
Answer: B
Explanation:
By default, BGP does not accept subnets redistributed from IGP. To advertise and carry subnet routes in BGP, use an explicit network command or the no auto-summary command. If you disable auto-summarization and have not entered a network command, you will not advertise network routes for networks with subnet routes unless they contain a summary route.
http://www.cisco.com/en/US/docs/ios/11_3/np1/command/reference/1rbgp.html
QUESTION 60
Refer to the exhibit. After a link flap in the network, which two EIGRP neighbors will not be queried for alternative paths? (Choose two.)
A. 192.168.1.1
B. 192.168.3.7
C. 192.168.3.8
D. 192.168.3.6
E. 192.168.2.1
F. 192.168.3.9
Answer: BC
Explanation:
Both 192.168.3.7 & 192.168.3.8 are in an EIGRP Stub area
The Enhanced Interior Gateway Routing Protocol (EIGRP) Stub Routing feature improves network stability, reduces resource utilization, and simplifies stub router configuration. Stub routing is commonly used in a hub and spoke network topology. In a hub and spoke network, one or more end (stub) networks are connected to a remote router (the spoke) that is connected to one or more distribution routers (the hub). The remote router is adjacent only to one or more distribution routers. The only route for IP traffic to follow into the remote router is through a distribution router. This type of configuration is commonly used in WAN topologies where the distribution router is directly connected to a WAN. The distribution router can be connected to many more remote routers. Often, the distribution router will be connected to 100 or more remote routers. In a hub and spoke topology, the remote router must forward all nonlocal traffic to a distribution router, so it becomes unnecessary for the remote router to hold a complete routing table. Generally, the distribution router need not send anything more than a default route to the remote router.
When using the EIGRP Stub Routing feature, you need to configure the distribution and remote routers to use EIGRP, and to configure only the remote router as a stub. Only specified routes are propagated from the remote (stub) router. The router responds to queries for summaries, connected routes, redistributed static routes, external routes, and internal routes with the message “inaccessible.” A router that is configured as a stub will send a special peer information packet to all neighboring routers to report its status as a stub router. Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes, and a router that has a stub peer will not query that peer. The stub router will depend on the distribution router to send the proper updates to all peers.
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/eigrpstb.html#wp1021949
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