Cisco 200-105 Free Practice Questions 2021
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NEW QUESTION 1
What would be the destination Layer 2 address in the frame header for a frame that is being forwarded by Dubai to the host address of 172.30.4.4?
- A. 825
- B. 230
- C. 694
- D. 387
Answer: C
Explanation: According to command output 172.30.4.4 is using the 694 dlci value. http://www.cisco.com/en/US/docs/ios/12_2/wan/command/reference/wrffr4.html#wp102934 3
NEW QUESTION 2
Which statement about the IP SLAs ICMP Echo operation is true?
- A. The frequency of the operation .s specified in milliseconds.
- B. It is used to identify the best source interface from which to send traffic.
- C. It is configured in enable mode.
- D. It is used to determine the frequency of ICMP packets.
Answer: D
Explanation: This module describes how to configure an IP Service Level Agreements (SLAs) Internet Control Message Protocol (ICMP) Echo operation to monitor end-to-end response time between a Cisco router and devices using IPv4 or IPv6. ICMP Echo is useful for troubleshooting network connectivity issues. This module also demonstrates how the results of the ICMP Echo operation can be displayed and analyzed to determine how the network IP connections are performing.
ICMP Echo Operation
The ICMP Echo operation measures end-to-end response time between a Cisco router and any devices using IP. Response time is computed by measuring the time taken between sending an ICMP Echo request message to the destination and receiving an ICMP Echo reply.
In the figure below ping is used by the ICMP Echo operation to measure the response time between the source IP SLAs device and the destination IP device. Many customers use IP SLAs ICMP-based operations, in-house ping testing, or ping-based dedicated probes for response time measurements.
Figure 1. ICMP Echo Operation
The IP SLAs ICMP Echo operation conforms to the same IETF specifications for ICMP ping testing and the two methods result in the same response times.
NEW QUESTION 3
Which command can be used from a router to verify the Layer 3 path to a host?
- A. tracert address
- B. traceroute address
- C. telnet address
- D. ssh address
Answer: B
NEW QUESTION 4
Refer to the exhibit.
The show interfaces serial 0/1 command was issued on the R10-1 router. Based on the output displayed which statement is correct?
- A. The cable connected to the serial 0/1 interface of the R10-1 router is a DTE cable.
- B. The R10-1 router can ping the router interface connected to the serial 0/1 interface.
- C. The clock rate used for interface serial 0/1 of the R10-1 router is 1,544,000 bits per second.
- D. The CSU used with the serial 0/1 interface of the R10-1 router has lost connection to the service provider.
- E. The interface of the remote router connected to the serial 0/1 interface of the R10-1 router is using the default serial interface encapsulation.
Answer: E
Explanation: Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for Cisco HDLC is the default encapsulation type for the serial interfaces.
NEW QUESTION 5
You enter the show ipv6 route command on an OSPF device and the device displays a route. Which conclusion can you draw about the environment?
- A. OSPF is distributing IPv6 routes to BGP.
- B. The router is designated as an ABR.
- C. The router is designated as totally stubby.
- D. OSPFv3 is in use.
Answer: A
NEW QUESTION 6
Which VLAN bridge priority value is assigned by the set span tree root command?
- A. 8192
- B. 16384
- C. 28672
- D. 32768
Answer: A
Explanation: 1. Explanations: The set spantree priority command provides a third method to specify the root switch: Source Cisco Website2. Switch-15> (enable)set spantree priority 81923. Spantree 1 bridge priority set to 8192.
NEW QUESTION 7
What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?
- A. SNMP
- B. Netflow
- C. WCCP
- D. IP SLA
Answer: B
Explanation: Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools. Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios- netflow/prod_white_paper0900aecd80406232.html
Topic 6, Infrastructure Maintenance
NEW QUESTION 8
Which option is the benefit of implementing an intelligent DNS for a cloud computing solution?
- A. It reduces the need for a backup data center.
- B. It can redirect user requests to locations that are using fewer network resources.
- C. It enables the ISP to maintain DNS records automatically.
- D. It eliminates the need for a GSS.
Answer: B
NEW QUESTION 9
Refer to the exhibit.
From R1, a network administrator is able to ping the serial interface of R2 but, unable to ping any of the subnets attached to RouterB. Based on the partial outputs in the exhibit, what could be the problem?
- A. EIGRP does not support VLSM.
- B. The EIGRP network statements are incorrectly configured.
- C. The IP addressing on the serial interface of RouterA is incorrect.
- D. The routing protocol has summarized on the classful boundary.
- E. EIGRP has been configured with an invalid autonomous system number.
Answer: D
Explanation: CCNA - EIGRP Common Question Reference:
http://www.orbitco-ccna-pastquestions.com/CCNA---EIGRP-Common-Question.php
If you look carefully at the R2 ip route, you will discover that the R2 does not learn any network from R1; this is because the routing protocol used here (EIGRP) performs auto summary when advertising routes to peers across a network. So in this case the address 172.17.0.0/16 is a summarized address. If the router was configured with no auto summary command, R2 LAN addresses would have been advertised and reached.
NEW QUESTION 10
Which identification number is valid for an extended ACL?
- A. 1
- B. 64
- C. 99
- D. 100
- E. 299
- F. 1099
Answer: D
NEW QUESTION 11
Refer to the exhibit.
Assume that all of the router interfaces are operational and configured correctly. How will router R2 be affected by the configuration of R1 that is shown in the exhibit?
- A. Router R2 will not form a neighbor relationship with R1.
- B. Router R2 will obtain a full routing table, including a default route, from R1.
- C. R2 will obtain OSPF updates from R1, but will not obtain a default route from R1.
- D. R2 will not have a route for the directly connected serial network, but all other directly connected networks will be present, as well as the two Ethernet networks connected to R1.
Answer: A
Explanation: Open Shortest Path First http://en.wikipedia.org/wiki/Open_Shortest_Path_First
The configuration of R1 shows "router ospf 1" however, the diagram also shows that both routers should be in the backbone OSPF Area of "0". When routers are in different OSPF areas they will not form a neighbor relationship.
Neighbor relationships
As a link state routing protocol, OSPF establishes and maintains neighbor relationships in order to exchange routing updates with other routers. The neighbor relationship table is
called an adjacency database in OSPF.
Provided that OSPF is configured correctly, OSPF forms neighbor relationships only with the routers directly connected to it. In order to form a neighbor relationship between two routers, the interfaces used to form the relationship must be in the same area. Generally an interface is only configured in a single area, however you can configure an interface to belong to multiple areas. In the second area, such an interface must be configured as a secondary interface. (A neighbor state simulation shows how neighbor state changes from Down to Full Adjacency progressively with exchanging Hello, DD, Request, Update, and Ack packets).
NEW QUESTION 12
Refer to the exhibit.
What commands must be configured on the 2950 switch and the router to allow communication between host 1 and host 2? (Choose two.)
- A. Router(config)# interface fastethernet 0/0 Router(config-if)# ip address 192.168.1.1 255.255.255.0 Router(config-if)# no shut down
- B. Router(config)# interface fastethernet 0/0 Router(config-if)# no shut down Router(config)# interface fastethernet 0/0.1 Router(config-subif)# encapsulation dot1q 10Router(config-subif)# ip address 192.168.10.1 255.255.255.0 Router(config)# interface fastethernet 0/0.2Router(config-subif)# encapsulation dot1q 20Router(config-subif)# ip address 192.168.20.1 255.255.255.0
- C. Router(config)# router eigrp 100 Router(config-router)# network 192.168.10.0Router(config-router)# network 192.168.20.0
- D. Switch1(config)# vlan database Switch1(config-vlan)# vtp domain XYZ Switch1(config-vlan)# vtp server
- E. Switch1(config)# interface fastethernet 0/1 Switch1(config-if)# switchport mode trunk
- F. Switch1(config)# interface vlan 1 Switch1(config-if)# ip default-gateway 192.168.1.1
Answer: BE
Explanation: The two answers B and E list all the commands needed to configure interVLAN routing. Please notice that Cisco switch 2950, 2960 only support dot1Q trunking so we don’t need to specify which trunking encapsulation to use in this case. For Cisco switches 3550 or above we have to use these commands instead:
Switch3550(config-if)#switchport trunk encapsulation dot1q Switch3550(config-if)#switchport mode trunk
References: http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a 00800949fd.shtml
https://learningnetwork.cisco.com/servlet/JiveServlet/download/5669-2461/Router%20on%20a%20Stick.pdf.
NEW QUESTION 13
Refer to the exhibit.
Given the output from the “show ip eigrp topology” command, which router is the feasible successor?
A)
B)
C)
D)
- A. Exhibit A
- B. Exhibit B
- C. Exhibit C
- D. Exhibit D
Answer: B
Explanation: To be the feasible successor, the Advertised Distance (AD) of that route must be less than the Feasible Distance (FD) of the successor. From the output of the “show ip eigrp topology
10.0.0.5 255.255.255.255 we learn that the FD of the successor is 41152000.
Now we will mention about the answers, in the “Composite metric is (…/…)” statement the first parameter is the FD while the second parameter is the AD of that route. So we need to find out which route has the second parameter (AD) less than 41152000 -> only answer B satisfies this requirement with an AD of 128256.
Reference: http://networklessons.com/eigrp/eigrp-neighbor-and-topology-table-explained/
NEW QUESTION 14
Which two statement about proxy ARP are true ? (Choose two)
- A. It is supported on networks without ARP.
- B. It allows machines to spoof packets.
- C. It requires larger ARP tables.
- D. It reduces the amount of ARP traffic.
Answer: BC
NEW QUESTION 15
Which three commands must you enter to create a trunk that allows VLAN 20? (Choose three)
- A. Switch(config-if)#switchport mode dynamic auto
- B. Switch(config-if)#switchport mode trunk
- C. Switch(config-if)#switchport trunk allowed vlan 20
- D. Switch(config-if)#switchport mode dynamic desirable
- E. Switch(config-if)#switchport trunk encapsulation dotlq
- F. Switch(config-if)#switchport trunk native vlan 20
Answer: BCE
NEW QUESTION 16
Which device classes are used over serial links? (Choose two)
- A. DCE
- B. DTE
- C. LCP
- D. HDLC
- E. PPP
- F. LMI
Answer: AB
NEW QUESTION 17
Which statement about the IP SLAs ICMP Echo operation is true?
- A. It is configured in enable mode.
- B. It is used to determine the one-way delay between devices.
- C. It is used to identify the best source interface from which to send traffic to a destination.
- D. The frequency of the operation is specified in milliseconds.
Answer: C
NEW QUESTION 18
Which two components are used to identify a neighbor in a BGP configuration? (Choose two.)
- A. autonomous system number
- B. version number
- C. router ID
- D. subnet mask
- E. IP address
Answer: AE
Explanation: Use the show ip bgp neighbors (registered customers only) command to display information about the TCP and Border Gateway Protocol (BGP) connections and verify if the BGP peer is established. The output of the show ip bgp neighbors command below shows the BGP state as 'Established', which indicates that the BGP peer relationship has been established successfully.
R1-AGS# show ip bgp neighbors | include BGP
BGP neighbor is 10.10.10.2, remote AS 400, internal link
BGP version 4, remote router ID 2.2.2.2 BGP state = Established, up for 00:04:20 BGP table version 1, neighbor version 1 R1-AGS#
The show ip bgp neighbors command has been used above with the modifier | include BGP. This makes the output more readable by filtering the the command output and displaying the relevant parts only.
In addition, the show ip bgp summary (registered customers only) command can also be used to display the status of all BGP connections, as shown below.
R1-AGS(9)# show ip bgp summary
BGP router identifier 10.1.1.2, local AS number 400 BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.10.10.2 4 400 3 3 1 0 0 00:00:26 0
NEW QUESTION 19
Routers R1 and R2 are on the same network segment, and both routers use interface Ethernet0/0. If R1 loses communication to R2, which two terns should you check as you begn GigabitEthernetO/0. If R1 lose: troubleshooting? (Choose two )
- A. Verify that R2 is using 802 1q encapsulation
- B. Verify that the GigabrtEthernet0/0 interfaces on R1 and R2 are configured with the same subnet mask.
- C. Verify that the R1 GigabitEthernet0/0 interface is up and the line protocol is down.
- D. Verify that R1 and R2 both are using HDLC encapsulation
- E. that the R1 GigabitEthernet0/0 interface is up and the line protocol is up.
Answer: BC
NEW QUESTION 20
A network administrator is troubleshooting an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information?
- A. Router# show ip eigrp adjacency
- B. Router# show ip eigrp topology
- C. Router#show ip eigrp interfaces
- D. Router#show ip eigrp neighbors
Answer: D
Explanation: Implementing EIGRP http://www.ciscopress.com/articles/article.asp?p=1171169&seqNum=3
Below is an example of the show ip eigrp neighbors command. The retransmit interval (Smooth Round Trip Timer – SRTT) and the queue counts (Q count, which shows the number of queued EIGRP packets) for the adjacent routers are listed:
R1#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 10.10.10.2 Fa0/0 12 00:00:39 1282 5000 0 3
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