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2021 Nov 200-105 testing engine

Q31. - (Topic 3) 

What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two.) 

A. They create split-horizon issues. 

B. They require a unique subnet within a routing domain. 

C. They emulate leased lines. 

D. They are ideal for full-mesh topologies. 

E. They require the use of NBMA options when using OSPF. 

Answer: B,C 

Explanation: http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=5 

Configuring Frame Relay Subinterfaces On partially meshed Frame Relay networks, the problem of split horizon can be overcome by using Frame Relay subinterfaces. Frame Relay provides a mechanism to allow a physical interface to be partitioned into multiple virtual interfaces. In a similar way, using subinterfaces allows a partially meshed network to be divided into a number of smaller, fully meshed point-to-point networks. Generally, each point-to-point subnetwork is assigned a unique network address. This allows packets received on one physical interface to be sent out from the same physical interface, albeit forwarded on VCs in different subinterfaces. There are two types of subinterfaces supported by Cisco routers: point-to-point and multipoint subinterfaces. 


Q32. - (Topic 3) 

At which layer of the OSI model does PPP perform? 

A. Layer 2 

B. Layer 3 

C. Layer 4 

D. Layer 5 

Answer:

Explanation: 

Point-to-Point Protocol (PPP) is a data link protocol commonly used in establishing a direct connection between two networking nodes. It can provide connection authentication, transmission encryption (using ECP, RFC 1968), and compression. 


Q33. - (Topic 3) 

What command is used to verify the DLCI destination address in a Frame Relay static configuration? 

A. show frame-relay pvc 

B. show frame-relay lmi 

C. show frame-relay map 

D. show frame relay end-to-end 

Answer:

Explanation: 

Cisco Frame Relay Configurations http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=9 show frame-relay map The show frame-relay map privileged EXEC mode command shows the contents of the next hop protocol address to DLCI mapping table on the router. The table contains both dynamic mapped and static mapped entries. The below example shows a sample output of the show frame-relay map command. Router#show frame-relay map Serial1/2 (up): ip 172.16.1.4 dlci 401(0x191,0x6410), dynamic, broadcast,, status defined, active Serial1/2 (up): ip 172.16.1.5 dlci 501(0x1F5,0x7C50), dynamic, broadcast,, status defined, active Serial1/2 (up): ip 172.16.1.2 dlci 301(0x12D,0x48D0), dynamic, broadcast,, status defined, active 


Q34. DRAG DROP - (Topic 3) 

Answer: 

Explanation: 

1) a router is this type of device: DTE2) the most common type of virtual circuit: PVC3) provides status messages between DTE and DCE devices: LMI4) identifies the virtual connection between the DTE and the switch: DLCI 

CCNA Certification Test Prep Case Study http://www.thebryantadvantage.com/CCNACertificationExamTutorialDirectlyConnectedSeri alInterfaces.htm Configuring the LMI Type on a Frame Relay Interface http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=3 Frame Relay DLCIs And Mappings http://www.mcmcse.com/cisco/guides/frame_relay_dlci.shtml 


Q35. - (Topic 2) 

When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state? 

A. exstart state > loading state > exchange state > full state 

B. exstart state > exchange state > loading state > full state 

C. exstart state > full state > loading state > exchange state 

D. loading state > exchange state > full state > exstart state 

Answer:

Explanation: 

OSPF states for adjacency formation are (in order) Down, Init, Attempt, 2-way, Exstart, 

Exchange, Loading and Full. 

Reference: 

Why Are OSPF Neighbors Stuck in Exstart/Exchange State? 

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0d.shtml 


Renewal 200-105 test questions:

Q36. - (Topic 1) 

Refer to the exhibit. 

The output that is shown is generated at a switch. Which three statements are true? (Choose three.) 

A. All ports will be in a state of discarding, learning, or forwarding. 

B. Thirty VLANs have been configured on this switch. 

C. The bridge priority is lower than the default value for spanning tree. 

D. All interfaces that are shown are on shared media. 

E. All designated ports are in a forwarding state. 

F. This switch must be the root bridge for all VLANs on this switch. 

Answer: A,C,E 

Explanation: 

From the output, we see that all ports are in Designated role (forwarding state) -> A and E 

are correct. 

The command “show spanning-tree vlan 30 only shows us information about VLAN 30. We 

don’t know how many VLAN exists in this switch -> B is not correct. 

The bridge priority of this switch is 24606 which is lower than the default value bridge 

priority 32768 -> C is correct. 

All three interfaces on this switch have the connection type “p2p”, which means Point-to-point environment – not a shared media -> D is not correct. 

The only thing we can specify is this switch is the root bridge for VLAN 3o but we can not 

guarantee it is also the root bridge for other VLANs -> F is not correct. 


Q37. - (Topic 2) 

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:

Explanation: 

CCNA - EIGRP Common Question Reference: 

http://www.orbitco-ccna-pastquestions.com/CCNA---EIGRP-Common-Question.php 

Explanation: 

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. 


Q38. - (Topic 3) 

Which protocol is an open standard protocol framework that is commonly used in VPNs, to provide secure end-to-end communications? 

A. RSA 

B. L2TP 

C. IPsec 

D. PPTP 

Answer:

Explanation: 

Internet Protocol Security (IPsec) is a technology protocol suite for securing Internet Protocol (IP) communications by authenticating and/or encrypting each IP packet of a communication session. IPsec also includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. 


Q39. - (Topic 3) 

Refer to the exhibit. 

What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown? 

A. The Serial0/0 interface is passing traffic. 

B. The DLCI 100 was dynamically allocated by the router 

C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server 

D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud 

E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP 

Answer:

Explanation: 

The term dynamic indicates that the DLCI number and the remote router IP address 

172.16.3.1 are learned via the Inverse ARP process. 

Inverse ARP is a technique by which dynamic mappings are constructed in a network, allowing a device such as a router to locate the logical network address and associate it with a permanent virtual circuit (PVC). 


Q40. - (Topic 2) 

Refer to the exhibit. 

Which three EIGRP routes will be present in the router R4's routing table? (Choose three.) 

A. 172.16.1.0/24 

B. 10.1.10.0/30 

C. 10.0.0.0/8 

D. 10.1.11.0/30 

E. 172.16.0.0/16 

F. 192.168.1.0/24 

Answer: C,E,F 

Explanation: 

EIGRP performs an auto-summarization each time it crosses a border between two different major networks, so when R2 advertises the routes to R4 it will advertise only the summarized routes of 10.0.0.0/8 and 172.16.0.0/16, along with the 192.168.1.0/24 route coming from R3.