Cisco 300-410 Online Practice Questions and Exam Preparation

Cisco 300-410 Online Questions & Answers

• Question 401:

  Examine the exhibit.

  

  You have determined that RTR2 is not advertising the CIDR summary address 192.168.0.0 to the other routers in AS 65100.

  Which set of configuration commands will enable the BGP router RTR2 to announce the network prefix 192.168.0.0/16 to the other routers in the AS 65100?

  A. router bgp 65100 neighbor 172.16.1.2 remote-as 65100 neighbor 192.168.3.2 remote-as 65100 network 192.168.3.0
  B. router bgp 65100 neighbor 172.16.1.2 remote-as 65101 neighbor 192.168.3.2 remote-as 65100 network 192.168.0.0
  C. router bgp 65100 neighbor 172.16.1.2 remote-as 65100 neighbor 192.168.3.2 remote-as 65100 network 192.168.0.0 mask 255.255.0.0 ip route 192.0.0.0 255.0.0.0 null 0
  D. router bgp 65100 neighbor 172.16.1.2 remote-as 65101 neighbor 192.168.3.2 remote-as 65100 network 192.168.0.0 mask 255.255.0.0 ip route 192.168.0.0 255.255.0.0 null 0
  D. router bgp 65100 neighbor 172.16.1.2 remote-as 65101 neighbor 192.168.3.2 remote-as 65100 network 192.168.0.0 mask 255.255.0.0 ip route 192.168.0.0 255.255.0.0 null 0

  ---

  Issuing the following commands will cause RTR2 to advertise the CIDR block 192.168.0.0/16 to the other routers by using BGP:

  RTR2(config)# router bgp 65100

  RTR2(config-router)# neighbor 172.16.1.2 remote-as 65101

  RTR2(config-router)# neighbor 192.168.3.2 remote-as 65100

  RTR2(config-router)# network 192.168.0.0 mask 255.255.0.0

  RTR2(config-router)# ip route 192.168.0.0 255.255.0.0 null 0 The network command specifies the address that will be inserted into the BGP table. Without the mask keyword, the classful network will be assumed. Because 255.255.0.0, or /16, is not the natural mask for any Class C address, the mask keyword must also be specified. Thus, 192.168.0.0 and 255.255.0.0 identify the desired address and mask of the 192.168.0.0/16 network prefix.

  The router checks the IP forwarding table for an exact match before it advertises the route. Without a matching entry in the IP forwarding table, that route will not be advertised. RTR2 must be able to advertise a CIDR block and not the individual subnets. A static route is required because BGP requires that a match of the network prefix be present in the forwarding table when using the network command with the mask keyword. Therefore, to ensure an exact match for the identified prefix exists in the IP

  forwarding table, and to ensure that the prefix will always be advertised, a static route for 192.168.0.0/16 to null 0 is also required.

  The syntax for the network command is shown below:

  network network-number [ mask network-mask ] [ route-map map-tag ]

  The parameters are:

  mask - This parameter is optional and identifies the network or subnetwork to advertise. route-map - This parameter is optional and identifies a preconfigured route-map that will be used to filter specific addresses from being advertised.

  The following command set is missing the mask keyword in the network command and the command to create a static route to null 0. The address used in the network command is also incorrect. It should 192.168.0.0:

  router bgp 65100

  neighbor 172.16.1.2 remote-as 65100

  neighbor 192.168.3.2 remote-as 65100

  network 192.168.3.0

  The following command set is missing the mask keyword in the network command and the command to create a static route to null 0:

  router bgp 65100

  neighbor 172.16.1.2 remote-as 65101

  neighbor 192.168.3.2 remote-as 65100

  network 192.168.0.0

  The following command set uses an incorrect mask (255.0.0.0) in the command that creates the static route to null 0. It should be 255.255.0.0:

  router bgp 65100

  neighbor 172.16.1.2 remote-as 65100

  neighbor 192.168.3.2 remote-as 65100

  network 192.168.0.0 mask 255.255.0.0

  ip route 192.0.0.0 255.0.0.0 null 0

  Objective:

  Layer 3 Technologies

  Sub-Objective:

  Describe, configure, and verify BGP peer relationships and authentication

  References:

  Internetworking Case Studies > Using the Border Gateway Protocol for Interdomain Routing > Controlling the Flow of BGP Updates > CIDR and Aggregate Addresses > Aggregation and Static Routes

• Question 402:

  How are MPLS Layer 3 VPN services deployed?

  A. The RD and RT values must match under the VRF.
  B. The import and export RT values under a VRF must always be the same.
  C. The label switch path must be available between the local and remote PE routers.
  D. The RD and RT values under a VRF must match on the remote PE router.
  C. The label switch path must be available between the local and remote PE routers.

  ---

  https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/vpn/65x/b-l3vpn-cg-ncs5500-65x/b-l3vpn-cg-ncs5500-65x_chapter_010.html

• Question 403:

  Which command can you use to verify that interfaces have been configured in the correct areas and to show timer intervals and neighbor adjacencies for OSPF?

  A. show ip ospf
  B. show ip route
  C. show ip protocol
  D. show ip ospf database
  E. show ip ospf interface
  E. show ip ospf interface

  ---

  The correct answer is show ip ospf interface. This command displays all of the important OSPF parameters that relate to each of the interfaces. Information can be displayed on a per-interface basis if an interface is specified. If none is specified, all interfaces running OSPF will be displayed.

  

  The following commands can be used to monitor and verify OSPF operation:

  show ip ospf - displays the number of times the SPF algorithm has run and the default LSU interval, but does not show neighbor adjacencies.

  show ip route - displays known routes and how they were discovered, but not timers and neighbor adjacencies.

  show ip protocol - displays information about timers, filters, metric, etc. for the entire router, but not OSPF neighbor adjacencies. show ip ospf database - displays the router ID, the OSPF process ID, and the contents of the topological database, but not adjacencies information or timer values.

  Objective:

  Layer 3 Technologies

  Sub-Objective:

  Configure and verify OSPF neighbor relationship and authentication

  References:

  Cisco > Cisco IOS IP Routing: OSPF Command Reference > show ip ospf interface

• Question 404:

  Recently you had a serious problem with a router and contacted TAC. They told you a core dump of the system would have been helpful in diagnosing the issue. You would like to configure the router to make a full copy of the memory image the next time the router experiences the type of issue that can generate a core dump. Which of the following is NOT a supported method of setting up a core dump?

  A. TFTP
  B. rcp
  C. Flash disk
  D. HTTP
  D. HTTP

  ---

  A core dump cannot be sent to a location using HTTP. The four supported methods for dumping a copy of the router's memory image are: TFTP FTP rcp Flash disk To use File Transfer Protocol (FTP) to configure a core dump, execute the following commands:

  ip ftp usename username

  ip ftp password password

  exception protocol ftp

  exception dump a.b.c.d

  To use Trivial File Transfer Protocol (TFTP) to configure a core dump, execute the following commands:

  exception dump a.b.c.d

  To use remote copy protocol (rcp) to configure a core dump, execute the following commands:

  exception protocol rcp

  exception dump a.b.c.d

  Finally, to send a core dump to a Flash drive, execute the following commands:

  exception crashinfo file flash:filename

  Objective:

  Infrastructure Services

  Sub-Objective:

  Configure and verify device management

  References: Home > Support > Creating Core Dumps Cisco > Cisco IOS Basic System Management Command Reference > A through M Commands > exception dump Cisco > Cisco IOS Basic System Management Command Reference > exception protocol Cisco > Cisco IOS Basic System Management Command Reference > exception crashinfo file

• Question 405:

  Which dialer interface command sets the maximum size of IP packets to 1492?

  A. router(config-if)# mtu 1492
  B. router(config-if)# ip ppp 1492
  C. router(config-if)# ip 1492
  D. router(config-if)# ip mtu 1492
  D. router(config-if)# ip mtu 1492

  ---

  The correct interface command to set the maximum size of IP packets (maximum transmission unit or MTU size) to 1492 is router(config-if)# ip mtu 1492. This command is required because RFC 2516 states the maximum receive unit (MRU) must not be negotiated larger than 1492 bytes.

  All other answers are invalid commands due to incorrect syntax.

  Objective:

  Network Principles

  Sub-Objective:

  Explain TCP operations

  References:

  Cisco > Cisco IOS IP Application Services Command Reference > idle (firewall farm datagram protocol) through ip slb natpool > ip mtu

• Question 406:

  Examine the exhibit by pressing the Exhibit(s) button.

  

  You are to configure R1 to belong to area 5. This area does not accept routes from the external AS or summary routes from any other internal areas. Refer to the IP addressing below.

  R1 - int E0 - 192.168.5.1/24 R2 - int E0 - 192.168.5.2/24 R2 - int E1 - 192.168.0.2/24 R3 - int E0 - 192.168.0.3/24

  Which configuration commands are required to correctly configure R1?

  A. R1(config)# router ospf 10 R1(config-router)# area 5 no-summary stub R1(config-router)# network 192.168.5.0 0.0.0.255 area 5
  B. R1(config)# router ospf 5 R1(config-router)# area 5 stub R1(config-router)# network 192.168.5.0 0.0.0.255 area 5
  C. R1(config)# router ospf 10 R1(config-router)# area 5 stub R1(config-router)# network 192.168.5.0 255.255.255.0 area 5
  D. R1(config)# router ospf 5 R1(config-router)# area 5 stub no-summary R1(config-router)# network 192.168.5.0 255.255.255.0 area 5
  B. R1(config)# router ospf 5 R1(config-router)# area 5 stub R1(config-router)# network 192.168.5.0 0.0.0.255 area 5

  ---

  All routers within a stub area must be configured as stub, or adjacencies will not form. Besides the command to enable OSPF and the command to identify the area, the only other required command identifies the area as a stub. At the area border router (ABR), R2, the no-summary keyword is required. The following commands are required to configure R1:

  R1(config)# router ospf 5 R1(config-router)# area 5 stub R1(config-router)# network 192.168.5.0 0.0.0.255 area 5

  A totally stubby area does not accept any external network LSAs (Type 5) or any inter-area summary LSAs (Types 3 and 4) from entering the area. Use the area stub command with the no-summary keyword on the ABR only to configure a totally stubby area.

  The correct syntax for the area stub command is shown below:

  Router(config-router)# area area-id stub [no-summary]

  Note that the optional no-summary keyword is used only on ABRs to block summary link advertisements into the stub area. This option creates a totally stubby area. It is very important to configure the command consistently on all routers within the area. OSPF sends its stub status (on or off) in its hello packets.

  If two neighbors have conflicting stub status, they will not form an adjacency, and you end up with no OSPF communication over that link.

  

  Objective:

  Layer 3 Technologies

  Sub-Objective:

  Configure and verify network types, area types, and router types

  References:

  Cisco > Home > Support > Technology Support > IP Routing > Design > Design Technotes > What Are OSPF Areas and Virtual Links? > What Are Areas, Stub Areas, and Not-So-Stubby Areas? Cisco IOS Master Command List, Release 12.4 > a through b > area stub

• Question 407:

  Examine the output of the show ip flow export command:

  

  Which statement is true regarding the results?

  A. 15 export packets were dropped because there was insufficient memory to create the export packet
  B. 3 export packets were dropped because CEF was unable to switch or forward the packet to the process level
  C. 61 packets were dropped because the send queue was full
  D. 8 flows were exported
  C. 61 packets were dropped because the send queue was full

  ---

  Sixty-one packets were dropped because the send queue was full. The last line in the output, 61 export packets were dropped due to output drops, will result when the send queue is full.

  Fifteen packets were not dropped because there was insufficient memory to create the export packet. Drops that occurred from insufficient memory are indicated with the line 3 flows failed due to lack of export packet, and there were only three of them.

  Three export packets were not dropped because CEF was unable to switch or forward the packet to the process level. Drops that occurred because CEF was unable to switch or forward the packet, are indicated with the line 15 export packets were dropped due to no fib, and there were fifteen of them.

  Eleven flows were sent, not eight. The eleven flows were sent in eight datagrams.

  Objective:

  Infrastructure Services

  Sub-Objective:

  Configure and verify Cisco NetFlow

  References:

  Cisco > Cisco IOS NetFlow Command Reference > show ip flow export Home > Products and services > Cisco IOS and NX-OS software > Cisco IOS Technologies > Management instrumentation > Cisco IOS NetFlow > Data sheets and literature > Introduction to Cisco IOS NetFlow - A Technical Overview

• Question 408:

  Refer to the exhibit. The network administrator configured the network to connect two disjointed networks and all the connectivity is up except the virtual link, which causes area 250 to be unreachable.

  

  Which two configurations resolve this issue? (Choose two.)

  A. R2 router ospf 1 no area 234 virtual-link 10.34.34.4 area 234 virtual-link 0.0.0.44
  B. R2 router ospf 1 no area 234 virtual-link 10.34.34.4 area 0 virtual-link 0.0.0.44
  C. R4 router ospf 1 no area 234 virtual-link 10.23.23.2 area 0 virtual-link 0.0.0.22
  D. R2 router ospf 1 router-id 10.23.23.2
  E. R4 router ospf 1 no area 234 virtual-link 10.23.23.2 area 234 virtual-link 0.0.0.22
  A. R2 router ospf 1 no area 234 virtual-link 10.34.34.4 area 234 virtual-link 0.0.0.44
  E. R4 router ospf 1 no area 234 virtual-link 10.23.23.2 area 234 virtual-link 0.0.0.22

  ---

  https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first- ospf/13703-8.html

  An important thing to remember when configuring virtual-link is we need to configure the OSPF router ID and NOT the IP address of the ABR. Therefore in this question we have to use the command "area 234 virtual-link 0.0.0.44" on R2 and "area 234 virtual-link 0.0.0.22" on R4.

• Question 409:

  DRAG DROP

  You are logged in to the DNA Center Client Health Dashboard. Under the client health, you see some color-coded fields that reflects the health status of the client devices. Drag the health scores on the left to their respective colors in the right.

  Select and Place:

  

  

  ---

  Explanation/Reference:

• Question 410:

  Refer to the exhibit.

  

  The engineer is getting an error when trying to transfer a new IOS file to the router. Which action resolves the issue?

  A. Delete some files on the router flash memory.
  B. Delete some files on the router NVRAM.
  C. Remove any access-list filtering the TFTP file transfer.
  D. Split the file into parts to transfer them one by one.
  A. Delete some files on the router flash memory.