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Q11. - (Topic 1) 

How does TCP differ from UDP? (Choose two.) 

A. TCP provides best effort delivery. 

B. TCP provides synchronized communication. 

C. TCP segments are essentially datagrams. 

D. TCP provides sequence numbering of packets. 

E. TCP uses broadcast delivery. 

Answer: B,D 

Explanation: 

Because TCP is a connection-oriented protocol responsible for ensuring the transfer of a datagram from the source to destination machine (end-to-end communications), TCP must receive communications messages from the destination machine to acknowledge receipt of the datagram. The term virtual circuit is usually used to refer to the handshaking that goes on between the two end machines, most of which are simple acknowledgment messages (either confirmation of receipt or a failure code) and datagram sequence numbers. Rather than impose a state within the network to support the connection, TCP uses synchronized state between the two endpoints. This synchronized state is set up as part of an initial connection process, so TCP can be regarded as a connection-oriented protocol. Much of the protocol design is intended to ensure that each local state transition is communicated to, and acknowledged by, the remote party. 

Reference: http://en.wikibooks.org/wiki/Communication_Networks/TCP_and_UDP_Protocols 


Q12. - (Topic 7) 

Which statement about native VLAN traffic is true? 

A. Cisco Discovery Protocol traffic travels on the native VLAN by default 

B. Traffic on the native VLAN is tagged with 1 by default 

C. Control plane traffic is blocked on the native VLAN. 

D. The native VLAN is typically disabled for security reasons 

Answer:


Q13. - (Topic 5) 

Refer to the exhibit. 

A technician is troubleshooting a host connectivity problem. The host is unable to ping a server connected to Switch_A. Based on the results of the testing, what could be the problem? 

A. A remote physical layer problem exists. 

B. The host NIC is not functioning. 

C. TCP/IP has not been correctly installed on the host. 

D. A local physical layer problem exists. 

Answer:

Explanation: 

Here we see that the host is able to ping its own loopback IP address of 127.0.0.1 and it’s own IP address of 10.0.0.35, so we know that the NIC is functioning and that the host’s TCP/IP stack is OK. However, it is not able to ping the IP address of its local default gateway, so we know that there is a local cabling problem between the switch and the router. 


Q14. - (Topic 4) 

What is the best practice when assigning IP addresses in a small office of six hosts? 

A. Use a DHCP server that is located at the headquarters. 

B. Use a DHCP server that is located at the branch office. 

C. Assign the addresses by using the local CDP protocol. 

D. Assign the addresses statically on each node. 

Answer:

Explanation: 

Its best to use static addressing scheme where the number of systems is manageable rather than using a dynamic method such as DHCP as it is easy to operate and manage. 


Q15. - (Topic 7) 

Which NAT type is used to translate a single inside address to a single outside address? 

A. dynamic NAT 

B. NAT overload 

C. PAT 

D. static NAT 

Answer:

Explanation: 

Network address translation (NAT) is the process of modifying IP address information in 

IP packet headers while in transit across a traffic routing device. 

There are two different types of NAT: . NAT . PAT 


Q16. - (Topic 3) 

OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? (Choose Three.) 

A. Each OSPF area requires a loopback interface to be configured. 

B. Areas may be assigned any number from 0 to 65535. 

C. Area 0 is called the backbone area. 

D. Hierarchical OSPF networks do not require multiple areas. 

E. Multiple OSPF areas must connect to area 0. 

F. Single area OSPF networks must be configured in area 1. 

Answer: B,C,E 

Explanation: 

Definition of OSPF areas: An OSPF network may be structured, or subdivided, into routing areas to simplify administration and optimize traffic and resource utilization. Areas are identified by 32-bit numbers, expressed either simply in decimal, or often in octet-based dot-decimal notation, familiar from IPv4 address notation. 

See discussion following Cisco Learning discussion. 

https://learningnetwork.cisco.com/message/90832 


Q17. - (Topic 5) 

A company has placed a networked PC in a lobby so guests can have access to the corporate directory. 

A security concern is that someone will disconnect the directory PC and re-connect their laptop computer and have access to the corporate network. For the port servicing the lobby, which three configuration steps should be performed on the switch to prevent this? (Choose three.) 

A. Enable port security. 

B. Create the port as a trunk port. 

C. Create the port as an access port. 

D. Create the port as a protected port. 

E. Set the port security aging time to 0. 

F. Statically assign the MAC address to the address table. 

G. Configure the switch to discover new MAC addresses after a set time of inactivity. 

Answer: A,C,F 

Explanation: 

If port security is enabled and the port is only designated as access port, and finally static MAC address is assigned, it ensures that even if a physical connection is done by taking out the directory PC and inserting personal laptop or device, the connection cannot be made to the corporate network, hence ensuring safety. 


Q18. DRAG DROP - (Topic 5) 

Drag the appropriate command on the left to the configuration task it accomplishes. (Not all options are used.) 

Answer: 


Q19. - (Topic 3) 

A network administrator is trying to add a new router into an established OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. Given the information in the partial configuration shown below, what configuration error is causing this problem? 

Router(config)# router ospf 1 

Router(config-router)# network 10.0.0.0 255.0.0.0 area 0 

A. The process id is configured improperly. 

B. The OSPF area is configured improperly. 

C. The network wildcard mask is configured improperly. 

D. The network number is configured improperly. 

E. The AS is configured improperly. 

F. The network subnet mask is configured improperly. 

Answer:

Explanation: 

When configuring OSPF, the mask used for the network statement is a wildcard mask similar to an access list. In this specific example, the correct syntax would have been “network 10.0.0.0 0.0.0.255 area 0.” 


Q20. - (Topic 7) 

Which routing protocol has the smallest default administrative distance? 

A. IBGP 

B. OSPF 

C. IS-IS 

D. EIGRP 

E. RIP 

Answer:

Explanation: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/15986-admin-distance.html Default Distance Value TableThis table lists the administrative distance default values of the protocols that Cisco supports: 

Route Source Default Distance Values 

Connected interface 0 Static route 1 Enhanced Interior Gateway Routing Protocol (EIGRP) summary route 5 External Border Gateway Protocol (BGP) 20 Internal EIGRP 90 IGRP 100 OSPF 110 Intermediate System-to-Intermediate System (IS-IS) 115 Routing Information Protocol (RIP) 120 Exterior Gateway Protocol (EGP) 140 On Demand Routing (ODR) 160 External EIGRP 170 Internal BGP 200 Unknown*