Cisco 300-410 Online Practice Questions and Exam Preparation

Cisco 300-410 Online Questions & Answers

• Question 121:

  Refer to the exhibits.

  

  To provide reachability to network 10.1.1.0/24 from R5, the network administrator redistributes EIGRP into OSPF on R3 but notices that R4 is now taking a suboptimal path through R5 to reach 10.1.1.0/24 network. Which action fixes the issue while keeping the reachability from R5 to 10.1.1.0/24 network?

  A. Change the administrative distance of the external EIGRP to 90.
  B. Apply the outbound distribution list on R5 toward R4 in OSPF.
  C. Change the administrative distance of OSPF to 200 on R5.
  D. Redistribute OSPF into EIGRP on R4.
  A. Change the administrative distance of the external EIGRP to 90.

• Question 122:

  An engineer configured access list NON-CISCO in a policy to influence routes.

  

  What are the two effects of this route map configuration? (Choose two.)

  A. Packets are forwarded using normal route lookup.
  B. Packets are forwarded to the default gateway.
  C. Packets are dropped by the access list.
  D. Packets are evaluated by sequence 10.
  E. Packets are not evaluated by sequence 10.
  A. Packets are forwarded using normal route lookup.
  D. Packets are evaluated by sequence 10.

• Question 123:

  What is the function of penultimate hop popping?

  A. The last P router in the path pops off the transport label before traffic is forwarded toward the PE.
  B. The VPN label is popped off at the egress LSR, and unlabeled traffic is forwarded toward the CE.
  C. The transport label is popped off at the egress LSR, and unlabeled traffic is forwarded toward the CE.
  D. The second to last P router in the path pops off the VPN label before traffic is forwarded to the last P router.
  A. The last P router in the path pops off the transport label before traffic is forwarded toward the PE.

• Question 124:

  Refer to the exhibit.

  

  An engineer configured SNMP traps to record spoofed packets drop of more than 48000 a minute on the ethernet0/0 interlace. During an IP spoofing attack, the engineer noticed that no notifications have been received by the SNMP server. Which configuration resolves the issue on R1?

  A. ip verity unicast notification threshold 48000
  B. ip verify unicast notification threshold 8000
  C. ip verify unicast notification threshold 800
  D. ip verify unicast notification threshold 80
  C. ip verify unicast notification threshold 800

• Question 125:

  An enterprise has implemented an IPv4 addressing scheme on the servers of its core network. To effectively handle the increasing user requests to the server, the enterprise has plans to implement three new subnets with IPv6 addressing in its existing IPv4 network. The network administrator has set up dual-stack routers on the boundary of these subnets, as shown in the network diagram.

  

  You need to ensure interoperability between IPv4 and IPv6 hosts such that routers A, B, and C can dynamically determine the destination of an IPv6 packet. In addition, global unicast addresses should be supported on all hosts in the three IPv6 subnets. Which of the following tunneling method can be used between the three routers? (Choose two.)

  A. GRE tunnel
  B. Automatic 6-to-4 tunnel
  C. ISATAP tunnel
  D. Manually-configured tunnel
  B. Automatic 6-to-4 tunnel
  C. ISATAP tunnel

  ---

  You can use either automatic 6-to-4 tunnel or an Intra-site Automatic Tunnel Addressing Protocol (ISATAP) tunnel. Both of these tunneling methods are point-to-multipoint tunneling methods. This means that a single router (the point) can send IPv6 packets to different IPv6 routers (multipoints), depending on the destination address. When a router receives an IPv6 packet from an IPv6 host, it encapsulates the IPv6 packet in an IPv4 packet, which is then sent through the IPv4 core network. When the IPv4

  packet is received at the destination router, the IPv6 address is extracted from the IPv4 packet and then forwarded to the intended IPv6 host.

  Automatic 6-to-4 tunnels are created automatically by two IPv6 routers separated by an IPv4 network. These tunnels consider the IPv4 network as a virtual non-broadcast multi-access (NBMA) link. The tunnel is formed for every IPv6 packet that travels from one IPv6 border router to another IPv6 border router. IPv4 and IPv6 must be supported at both the border routers.

  In automatic 6-to-4 tunneling, addresses belonging to the 2002::/16 prefix are used. In such IPv6 addresses, the 32-bit IPv4 address of each edge router is embedded into its IPv6 address increasing the length of the prefix to 48 (16 + 32). In automatic 6-to-4 tunnel, the IPv4 address of the router is embedded into the second the third quartet of the IPv6 address of the router.

  ISATAP is also an automatic tunneling mechanism that uses an underlying IPv4 network as a NBMA link for IPv6 networks. However, it is most suitable for exchanging packets within an IPv6 network instead of exchanging packets between two IPv6 networks. With ISATAP tunnels, IPv6 dual-stack routers connected through the same IPv4 network can communicate with one another.

  ISATAP works with unicast IPv6 addresses that are identified by a 64-bit prefix. The lowermost 64 bits are used to identify the interface of the router and are in modified EUI-64 format. The 0:5eFe value exists in the first 32 bits of the interface identifier. This value indicates that the IPv6 address is an ISATAP address. The remaining 32 bits contain the hexadecimal value of the IPv4 address; that is, the seventh and the eighth quartets in the IPv6 contain the IPv4 address.

  You should not use a GRE tunnel or a manually configured tunnel between the three routers. These two tunneling methods provide static point-to-point tunnel between two IPv6 routers through an IPv4 network. Both these tunneling methods assume a virtual point-to-point link.

  Objective:

  Network Principles

  Sub-Objective:

  Recognize proposed changes to the network

  References:

  Cisco IPv6 Implementation Guide; Implementing Tunneling for IPv6

• Question 126:

  Refer to the exhibit. A network engineer executes the show ipv6 ospf database command and is presented with the output that is shown. Which flooding scope is referenced in the link-state type?

  

  A. link-local
  B. area
  C. As (OSPF domain)
  D. reserved
  B. area

• Question 127:

  Refer to the exhibit

  

  The remote branch locations have a static neighbor relationship configured to R1 only R1 has successful neighbor relationships with the remote locations of R2 and R3, but the end users cannot communicate with each other. Which configuration resolves the issue?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  D. Option D

• Question 128:

  Examine the exhibit.

  

  Router R2 has been configured with the following OSPF router command:

  area 1 range 130.31.96.0 255.255.224.0

  Which addresses listed will be summarized by R2 into area 0? (Choose all that apply.)

  A. 130.31.128.0/23
  B. 130.31.112.0/20
  C. 130.31.130.0/24
  D. 130.31.160.0/22
  E. 130.31.104.0/21
  B. 130.31.112.0/20
  E. 130.31.104.0/21

  ---

  The command area 1 range130.31.96.0 255.255.224.0 is used to summarize the IP network addresses from 130.31.96.0/24 to 130.31.127.0/24 in area 1. Addresses 130.31.112.0/20 and 130.31.104.0/21 are both in that range of network addresses. To determine if an address is a part of a summary, put the summary address and summary mask in binary format. Do the same with the address and the summary mask you are examining, as shown below:

  130.31.96.0 10000010.00001111.01100000.00000000

  130.31.112.0 10000010.00001111.01110000.00000000

  255.255.224.0 11111111.11111111.11100000.00000000 If the address you are testing and the summary address agree to the point where the mask stops, then the test address is part of the summary. In this case, they agree through the 27th bit, so this address is a part of the summary. The same is true for the 130.31.104.0 address. In OSPF, you can only configure summarization on the border routers. The summaries need to be of routes within a single area. You summarize the routes of an area so that routers in another area do not see the individual networks, just the summary. The correct command is: area area id range ip-address mask The area id parameter is the number of the area whose networks are being summarized. For example, in the network shown in the exhibit, to summarize the networks within area 1 to 130.31.96.0/19 you would configure router R2 with the command area 1 range 130.31.96.0 255.255.224.0. This would not affect the routing tables of the routers within area 1, but instead make the routing tables of areas 0 and 2 smaller. These other routers would only have the summary route listed instead of the individual

  networks. Router 3 would only see the summary route 130.31.96.0/19.

  Objective:

  Layer 3 Technologies

  Sub-Objective:

  Configure and verify manual and autosummarization with any routing protocol

  References:

  Cisco > Home > Support > Technology Support > IP Routing > Technology Information > Technology White Paper > OSPF Design Guide > OSPF and Route Summarization > Inter-Area Route Summarization Cisco IOS Master Command List, Release 12.4 > a through b > area range

• Question 129:

  Refer to the exhibits.

  

  London must reach Rome using a faster path via EIGRP if all the links are up but it failed to take this path Which action resolves the issue?

  A. Increase the bandwidth of the link between London and Barcelona
  B. Use the network statement on London to inject the 172 16 X 0/24 networks into EIGRP.
  C. Change the administrative distance of RIP to 150
  D. Use the network statement on Rome to inject the 172 16 X 0/24 networks into EIGRP
  D. Use the network statement on Rome to inject the 172 16 X 0/24 networks into EIGRP

  ---

  Prefixes from Rome are only advertised in RIP (AD-120). After advertising it in EIGRP these prefixes will be preferred by London site. Additionally, London site performs redistribution of connected routes in EIGRP (see output).

• Question 130:

  Examine the following output.

  

  You are investigating why router RouterA does not include the 172.16.0.0 network in its BGP advertisements. The output contains portions of RouterA's configuration and IP routing table. Which statement correctly identifies the reason why this subnet does not appear in the BGP advertisements?

  A. BGP synchronization is enabled by default.
  B. The no auto-summary command was used.
  C. The 172.16.31.0/24 network was learned through BGP.
  D. The 10.1.2.3 IP address was not defined as a BGP neighbor.
  B. The no auto-summary command was used.

  ---

  The no auto-summary command affects how a network identified by using the network command is advertised. The way the router in the exhibit is configured, it will not announce the 172.16.31.0/24 subnet. The BGP router will announce the classful address 172.16.0.0/16 when the routing table, maintained by the IGP, contains an exact match to the network command.

  The network command directly affects what network is advertised in BGP. If the command does not also include a network mask, and if auto-summary is enabled, then the classful address 172.16.0.0 is advertised any time that the router learns about a subnet of 172.16.0.0 via its IGP such as OSPF or EIGRP. The routing table does contain an entry for the 172.16.31.0/24 subnet that was learned through the IGP. However, auto- summary is disabled with the no auto-summary command. Therefore, only

  networks in the routing table that are an exact match to the network commands are advertised.

  If the configuration goal is to announce the 172.16.0.0/16 network any time one of its subnets is learned, such as 172.16.31.0/24, then you should enable auto-summary. If the goal is to announce only the 172.16.31.0/24 subnet learned through the IGP, then you should alter the network command's IP address and include the subnet mask.

  The BGP synchronization rule specifies that networks will not be advertised or used via iBGP unless it also has been learned through an IGP. If synchronization is disabled, iGBP will advertise a network without also learning it through an IGP.

  It does not affect the summarization of routes.

  The 172.16.31.0 network was learned through an IGP session with router 10.1.2.3.

  Objective:

  Layer 3 Technologies

  Sub-Objective:

  Configure and verify eBGP (IPv4 and IPv6 address families)

  References:

  Cisco IOS Master Command List, Release 12.4 > a through b > BGP Commands: A through B > auto- summary (BGP)

  Cisco > Cisco IOS IP Routing: BGP Command Reference > router bgp Cisco > Cisco IOS IP Routing: BGP Command Reference > network (BGP and multiprotocol BGP)