Cisco 200-105 Braindumps 2021

NEW QUESTION 1
Refer to the exhibit.

Router edge-1 is unable to establish OSPF neighbor adjacency with router ISP-1. Which
two configuration changes can you make on edge-1 to allow the two routers to establish adjacency? (Choose two.)

• A. Set the subnet mask on edge-1 to 255 255.255.252.
• B. Reduce the MTU on edge-1 to 1514.
• C. Set the OSPF cost on edge-1 to 1522.
• D. Reduce the MTU on edge-1 to 1500.
• E. Configure the ip ospf mtu-ignore command on the edge-1 Gi0/0 interface.

Answer: DE

Explanation: A situation can occur where the interface MTU is at a high value, for example 9000, while the real value of the size of packets that can be forwarded over this interface is 1500.
If there is a mismatch on MTU on both sides of the link where OSPF runs, then the OSPF adjacency will not form because the MTU value is carried in the Database Description (DBD) packets and checked on the other side.

NEW QUESTION 2



Which connection uses the default encapsulation for serial interfaces on Cisco routers?

• A. The serial connection to the NorthCoast branch office.
• B. The serial connection to the North branch office.
• C. The serial connection to the Southlands branch office.
• D. The serial connection to the Multinational Core.

Answer: B

Explanation: Cisco default encapsulation is HDLC which is by default enabled on all cisco router. If we want to enable other encapsulation protocol (PPP,X.25 etc) we need to define in interface setting. But here except s1/1 all interface defined by other encapsulation protocol so we will assume default encapsulation running on s1/1 interface and s1/1 interface connected with North

NEW QUESTION 3
Which two pieces of information are provided by the show controllers serial 0 command? (Choose two.)

• A. the type of cable that is connected to the interface.
• B. The uptime of the interface
• C. the status of the physical layer of the interface
• D. the full configuration of the interface
• E. the interface's duplex settings

Answer: AC

Explanation: The show controller command provides hardware-related information useful to troubleshoot and diagnose issues with Cisco router interfaces. The Cisco 12000 Series uses a distributed architecture with a central command-line interface (CLI) at the Gigabit Route Processor (GRP) and a local CLI at each line card.

NEW QUESTION 4
Refer to the exhibit.

A network associate has configured OSPF with the command: City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement? (Choose three.)

• A. FastEthernet0 /0
• B. FastEthernet0 /1
• C. Serial0/0
• D. Serial0/1.102
• E. Serial0/1.103
• F. Serial0/1.104

Answer: BCD

Explanation: The “network 192.168.12.64 0.0.0.63 equals to network 192.168.12.64/26. This network has:Increment: 64 (/26= 1111 1111.1111 1111.1111 1111.1100 0000)Network address:
192.168.12.64
Broadcast address: 192.168.12.127Therefore all interface in the range of this network will join OSPF - B C D are correct.

NEW QUESTION 5
What can cause two OSPF neighbors to be stuck in the EXSTART state?

• A. There is a low bandwidth connection between neighbors.
• B. The neighbors have different MTU settings.
• C. The OSPF interfaces are in a passive state.
• D. There is only layer one connectivity between neighbors.

Answer: B

Explanation: Neighbors Stuck in Exstart/Exchange State
The problem occurs most frequently when attempting to run OSPF between a Cisco router and another vendor's router. The problem occurs when the maximum transmission unit (MTU) settings for neighboring router interfaces don't match. If the router with the higher MTU sends a packet larger that the MTU set on the neighboring router, the neighboring router ignores the packet.0 When this problem occurs, the output of the show ip ospf neighbor command displays output similar that shown below:
router-6# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface 170.170.11.7 1 EXCHANGE/ - 00:00:36 170.170.11.7 Serial2.7
router-6#
router-7# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface 170.170.11.6 1 EXSTART/ - 00:00:33 170.170.11.6 Serial0.6
Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first- ospf/13684-12.html

NEW QUESTION 6
Which statement about VLAN configuration is true?

• A. The switch must be in config-vlan mode before you configure an extended VLAN.
• B. Dynamic inter-VLAN routing is supported on VLAN 2 through VLAN 4064.
• C. A switch in VTP transparent mode saves the VLAN database to the running configuration only.
• D. The switch must be in VTP server or transparent mode before you configure a VLAN.

Answer: D

NEW QUESTION 7
Scenario
Refer to the topology. Your company has connected the routers R1. R2. and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.









The loopback interfaces on R4 with the IP addresses of 10.4.4.4 /32, 10.4.4.5/32. and 10.4.4.6/32 are not appearing in the routing table of R5 Why are the interfaces missing?

• A. The interfaces are shutdown, so they are not being advertised.
• B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
• C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
• D. The loopback addresses haven't been advertised, and the network command is missing on R4.

Answer: B

Explanation: For an EIGRP neighbor to form, the following must match:
- Neighbors must be in the same subnet- K values- AS numbers- Authentication method and key strings
Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.

NEW QUESTION 8
Which purpose of the network command in OSPF configuration mode is true?

• A. It defines a wildcard mask to identify the size of the network.
• B. It defines the area ID.
• C. It defines the network by its classful entry.
• D. It defines which networks are used for virtual links.

Answer: A

NEW QUESTION 9
What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two.)

• A. hello packets
• B. SAP messages sent by other routers
• C. LSAs from other routers
• D. beacons received on point-to-point links
• E. routing tables received from other link-state routers
• F. TTL packets from designated routers

Answer: AC

Explanation: Link State Routing Protocols http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4
Link state protocols, sometimes called shortest path first or distributed database protocols, are built around a well-known algorithm from graph theory, E. W. Dijkstra'a shortest path algorithm. Examples of link state routing protocols are:
Open Shortest Path First (OSPF) for IP
The ISO's Intermediate System to Intermediate System (IS-IS) for CLNS and IP DEC's DNA Phase V
Novell's NetWare Link Services Protocol (NLSP)
Although link state protocols are rightly considered more complex than distance vector
protocols, the basic functionality is not complex at all:
1. Each router establishes a relationship—an adjacency—with each of its neighbors.
2. Each router sends link state advertisements (LSAs), some
3. Each router stores a copy of all the LSAs it has seen in a database. If all works well, the databases in all routers should be identical.
4. The completed topological database, also called the link state database, describes a graph of the internetwork. Using the Dijkstra algorithm, each router calculates the shortest path to each network and enters this information into the route table.

NEW QUESTION 10
Which three checks must you perform when troubleshooting EIGRPvB adjacencies? (Choose three.)

• A. Verify that IPv6 is enabled.
• B. Verify that the network command has been configured.
• C. Verify that auto summary is enabled.
• D. Verify that the interface is up.
• E. Verify that an IPv4 address has been configured.
• F. Verify that the router ID has been configured.

Answer: ADF

NEW QUESTION 11
It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following are required to solve this? (Choose three)

• A. configure static frame relay map entries for each subinterface network.
• B. remove the ip address from the physical interface
• C. create the virtual interfaces with the interface command
• D. configure each subinterface with its own IP address
• E. disable split horizon to prevent routing loops between the subinterface networks
• F. encapsulate the physical interface with multipoint PPP

Answer: BCD

Explanation: How To Configure Frame Relay Subinterfaces
http://www.orbit-computer-solutions.com/How-To-Configure-Frame-Relay- Subinterfaces.php
Step to configure Frame Relay subinterfaces on a physical interface:
1. Remove any network layer address (IP) assigned to the physical interface. If the physical interface has an address, frames are not received by the local subinterfaces.
2. Configure Frame Relay encapsulation on the physical interface using the encapsulation frame-relay command.
3. For each of the defined PVCs, create a logical subinterface. Specify the port number, followed by a period (.) and the subinterface number. To make troubleshooting easier, it is suggested that the subinterface number matches the DLCI number.
4. Configure an IP address for the interface and set the bandwidth.
5. Configure the local DLCI on the subinterface using the frame-relay interface-dlci command.
Configuration Example: R1>enable R1#configure terminal
R1(config)#interface serial 0/0/0 R1(config-if)#no ip address
R1(config-if)#encapsulation frame-relay
R1(config-if)#no shutdown R1(config-if)#exit
R1(config-subif)#interface serial 0/0/0.102 point-to-point R1(config-subif)#ip address 192.168.1.245 255.255.255.252
R1(config-subif)#frame-relay interface-dlci 102 R1(config-subif)#end
R1#copy running-config startup-config

NEW QUESTION 12
Refer to the exhibit.

The following commands are executed on interface fa0/1 of 2950Switch.
2950Switch(config-if)# switchport port-security
2950Switch(config-if)# switchport port-security mac-address sticky 2950Switch(config-if)# switchport port-security maximum 1
The Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame is received by 2950Switch? (Choose two.)

• A. The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF.
• B. Only host A will be allowed to transmit frames on fa0/1.
• C. This frame will be discarded when it is received by 2950Switch.
• D. All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.
• E. Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be forwarded out fa0/1.
• F. Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be forwarded out fa0/1.

Answer: BD

Explanation: The first command 2950Switch(config-if)#switchport port-security is to enable the port- security in a switch port.
In the second command 2950Switch(config-if)#switchport port-security mac-address sticky, we need to know the full syntax of this command is switchport port-security mac-address sticky [MAC]. The STICKY keyword is used to make the MAC address appear in the running configuration and you can save it for later use. If you do not specify any MAC addresses after the STICKY keyword, the switch will dynamically learn the attached MAC Address and place it into your running-configuration. In this case, the switch will dynamically learn the MAC address 0000.00aa.aaaa of host A and add this MAC address to the running configuration.
In the last command 2950Switch(config-if)#switchport port-security maximum 1 you limited the number of secure MAC addresses to one and dynamically assigned it (because no MAC address is mentioned, the switch will get the MAC address of the attached MAC address to interface fa0/1), the workstation attached to that port is assured the full bandwidth of the port.Therefore only host A will be allowed to transmit frames on fa0/1 -> B is correct.
After you have set the maximum number of secure MAC addresses for interface fa0/1, the secure addresses are included in the “Secure MAC Address” table (this table is similar to the Mac Address Table but you can only view it with the show port-security address command). So in this question, although you don’t see the MAC address of host A listed in the MAC Address Table but frames with a destination of 0000.00aa.aaaa will be forwarded
out of fa0/1 interface -> D is correct.

NEW QUESTION 13
CORRECT TEXT
A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 - 192.168.100.30.

Answer:

Explanation: The above named organization has 14 hosts that need to access the internet simultaneously but were provided with just 6 public IP addresses from198.18.184.105 to 198.18.184.110/29.
In this case, you have to consider using NAT Overload (or PAT) Double Click on the Weaver router to access the CLI
Router> enable
Router# configure terminal
First you should change the router's name to Weaver: Router(config)#hostname Weaver
Create a NAT pool of global addresses to be allocated with their netmask: Weaver(config)# ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248
Create a standard access control list that permits the addresses that are to be translated: Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15
Establish dynamic source translation, specifying the access list that was defined in the prior step:
Weaver(config)#ip nat inside source list 1 pool mypool overload Finally, we should save all your work with the following command: Weaver#copy running-config startup-config (Don't forget this)
Check your configuration by going to "Host for testing" and type: C : >ping 192.0.2.114
The ping should work well and you will be replied from 192.0.2.114
This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110) Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to- one) by using different ports.
The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements.
This is how to configure the NAT inside and NAT outside, just for your understanding: Weaver(config)#interface fa0/0
Weaver(config-if)#ip nat inside
Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end

NEW QUESTION 14
Which two of these statements regarding RSTP are correct? (Choose two.)

• A. RSTP cannot operate with PVST+.
• B. RSTP defines new port roles.
• C. RSTP defines no new port states.
• D. RSTP is a proprietary implementation of IEEE 802.1D STP.
• E. RSTP is compatible with the original IEEE 802.1D STP.

Answer: BE

Explanation: http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cf a.shtml
Port Roles
The role is now a variable assigned to a given port. The root port and designated port roles remain, while the blocking port role is split into the backup and alternate port roles. The Spanning Tree Algorithm (STA) determines the role of a port based on Bridge Protocol Data Units (BPDUs). In order to simplify matters, the thing to remember about a BPDU is there is always a method to compare any two of them and decide whether one is more useful than the other. This is based on the value stored in the BPDU and occasionally on the port on which they are received. This considered, the information in this section explains practical approaches to port roles.
Compatibility with 802.1D
RSTP is able to interoperate with legacy STP protocols. However, it is important to note that the inherent fast convergence benefits of 802.1w are lost when it interacts with legacy bridges.

NEW QUESTION 15
Which type of interface can negotiate an IP address for a PPPoE client?

• A. Ethernet
• B. dialer
• C. serial
• D. Frame Relay

Answer: B

NEW QUESTION 16
While you were troubleshooting a connection issue, a ping from one VLAN to another VLAN on the same switch failed. Which command verifies that IP routing is enabled on interfaces and the local VLANs are up?

• A. show ip interface brief
• B. show ip nat statistics
• C. show ip statistics
• D. show ip route

Answer: A

Explanation: Initiate a ping from an end device in one VLAN to the interface VLAN on another VLAN in order to verify that the switch routes between VLANs. In this example, ping from VLAN 2 (10.1.2.1) to Interface VLAN 3 (10.1.3.1) or Interface VLAN 10 (10.1.10.1). If the ping fails, verify that IP routing is enabled and that the VLAN interfaces status is up with the show ip interface brief command.

Topic 2, LAN Switching Technologies

NEW QUESTION 17
What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router?

• A. 2
• B. 4
• C. 16
• D. unlimited

Answer: B

Explanation: 4 is the default number of routes that OSPF will include in routing table if more than 4 equal cost routes exist for the same subnet. However, OSPF can include up to 16 equal cost routes in the routing table and perform load balancing amongst them. In order to configure this feature, you need to use the OSPF subcommand maximum-paths, i.e. maximum- paths 16.

NEW QUESTION 18
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 19
Refer to the exhibit.

The Lakeside Company has the internetwork in the exhibit. The administrator would like to reduce the size of the routing table on the Central router. Which partial routing table entry in the Central router represents a route summary that represents the LANs in Phoenix but no additional subnets?

• A. 10.0.0.0/22 is subnetted, 1 subnetsD 10.0.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
• B. 10.0.0.0/28 is subnetted, 1 subnetsD 10.2.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
• C. 10.0.0.0/30 is subnetted, 1 subnetsD 10.2.2.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
• D. 10.0.0.0/22 is subnetted, 1 subnetsD 10.4.0.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
• E. 10.0.0.0/28 is subnetted, 1 subnetsD 10.4.4.0 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1
• F. 10.0.0.0/30 is subnetted, 1 subnetsD 10.4.4.4 [90/20514560] via 10.2.0.2, 6w0d, Serial0/1

Answer: D

Explanation: All the above networks can be summarized to 10.0.0.0 network but the question requires to “represent the LANs in Phoenix but no additional subnets” so we must summarized to
10.4.0.0 network. The Phoenix router has 4 subnets so we need to “move left” 2 bits of “/24-> /22 is the best choice - D is correct.

NEW QUESTION 20
Whats DTP’s default in a switch

• A. ON
• B. OFF
• C. Dynamic ?Desirable?
• D. Dynamic Auto

Answer: D