Test your basic knowledge |

CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. At which layer of the TCP/IP model does ethernet operate?
The packets will be delivered and reassembled at destination.
UTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network Access

2. What are 2 protocols for transfering web resources?
Ctrl + Shift + 6
A. HTTP b. HTTPS
A. application b. services
A. DB 60 b. Winchester 15-pin c. smart serial

3. What is a benefit of a WAN?
Flash
A. show startup-config b. show running-config
It has expanded adressing capabilities.
Host mobility

4. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
OTDR
2046
The magnetic field around the adjacent pairs of wire.
As the commands are entered.

5. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Source Port
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
Switch

6. 3 functions of the upper data link sublayer in the OSI model
Collisions can decrease network performance.
8
Fiber
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

7. statements of IP adressing
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
Router(config)# hostname Costas
SSH
The packets will be delivered and reassembled at destination.

8. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
It does not support encryption.
A. enable mode b. priviledge executive mode
Network address
The packets will be delivered and reassembled at destination.

9. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. HTTP b. HTTPS
SMB
TCP initializes the sequence numbers for the sessions.
Network

10. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
Collisions can decrease network performance.
A. show startup-config b. show running-config
The address of the router that the host will use to 'get to the other side'.
A. it has centralized administration b. security is easier to enforce

11. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
DNS
A. low overhead b. connectionless
IP Protocol

12. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Network portion
IP is not properly installed
Time-to-live (TTL)
It reduces unnecessary broadcasts.

13. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Host A
Application Layer
To enable a receiving host to forward the data to the appropriate application.

14. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. physical layer b. DLL layer
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A default gateway (router).
Destination Network Address

15. What do end devices do?
TCP initializes the sequence numbers for the sessions.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. goodput b. throughput c. bandwidth
Originate data flow.

16. 3 primary functions of the data link layer encapsulation
A. performance degradation b. security issues c. host identification
Rollover cable
A. addressing b. error detection c. frame delimiting
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

17. 2 functions of encapsulation
The destination host address.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
A. enable mode b. priviledge executive mode

18. During a TCP session - if packets arrive out of order - what will happen?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
OTDR
A. minimizing of collisions b. division into broadcast domains
The packets will be delivered and reassembled at destination.

19. Which characteristics describe fiber optic cable?
A. Cat5 UTP b. Cat6 UTP
Is used by the server to resolve names.
A. servers b. routers c. network printers
A. not affected by EMI of RFI b. most expensive type of LAN cabling

20. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
IP Protocol
Source and Destination IP address
80 (HTTP)
Network Media Control

21. 3 properties of peer-2-peer applications
Router(config)# interface FastEthernet 0/1
TCP initializes the sequence numbers for the sessions.
Next-Hop Address
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks

22. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. it has centralized administration b. security is easier to enforce
It has expanded adressing capabilities.
A. goodput b. throughput c. bandwidth

23. What is the purpose of resource records in DNS?
Switch
Is used by the server to resolve names.
It provides for the exchange of data over a common local media.
Fiber

24. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Network portion
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Fiber
SSH

25. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
DNS
Minimal delays in data delivery.
A. larger address space b. data types and classes of service c. authentication and encryption

26. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
FTP
A. show startup-config b. show running-config
A. Physical b. Data Link
MAC

27. What are key considering factors when grouping hosts into common networks?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Twisting of the cables
Rollover cable
A. purpose b. geographic location c. ownership

28. 3 statements about routes and their use
IP Protocol
A. hot keys b. context-sensitive c. command syntax check
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate
Identify processes or services that are communicating with end devices.

29. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
FTP
Originate data flow.
It provides for the exchange of data over a common local media.
8

30. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Fiber
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Show Interfaces

31. What event occurs during the 3-way handshake?
A. next-hop b. metric/interface c. destination network address
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Time-to-live (TTL)
TCP initializes the sequence numbers for the sessions.

32. Network Protocols
A backbone cable.
A. performance degradation b. security issues c. host identification
Minimal delays in data delivery.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

33. What information is added during encapsulation at OSI Layer 3?
Twisting of the cables
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Console interface
Source and Destination IP address

34. What is a drawback of the CSMA/CD access method?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. addressing b. error detection c. frame delimiting
Collisions can decrease network performance.
Host mobility

35. Where is the IOS file stored at?
Flash
A. router b. firewall
A physical topology.
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network

36. When do changes take effect in a Cisco router?
It provides interface between applications on either end of the network.
When connecting a host to a switch.
As the commands are entered.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

37. What can you identify when you examine the Network Layer header?
Network address
A physical topology.
Application Layer
The destination host address.

38. What is an automated service that matches resource names w/ required IP addresses?
SMB
DNS
Router(config)# interface FastEthernet 0/1
Network Layer Packet

39. What is the primary purpose of Layer 4?
Network Access
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Identify processes or services that are communicating with end devices.
Destination is not contacted before a packet is sent.

40. When is a straight-through cable used in a network?
When connecting a host to a switch.
SMB
A. enable mode b. priviledge executive mode
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

41. Which type of cable is most often associated w/ fiber-optic cable?
A. non-deterministic b. less overhead c. collisions exist
IP is not properly installed
IP Protocol
A backbone cable.

42. What is the purpose of a default gateway?
The destination host address.
Ctrl + Shift + 6
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

43. What is the purpose of the preamble in an ethernet frame?
Identify the device that allows local network computers to communicate w/ devices in other networks.
As the commands are entered.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. decentralized resources b. resource sharing w/o a dedicated server

44. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Logical Link Control sublayer
A. non-deterministic b. less overhead c. collisions exist
Source and Destination IP address
Hosts return to listen-before-transmit mode.

45. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
It uses support from the lower layers to distinguish between connections to the service.
A. purpose b. geographic location c. ownership
A physical topology.

46. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
Source and Destination Ports
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
They must wait until the first hosts finish transfering the media.

47. What characteristic of an UTP helps reduce interference?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Is used by the server to resolve names.
8
Twisting of the cables

48. What command is used to change the default name to 'Costas'?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A default gateway (router).
Router(config)# hostname Costas
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate

49. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A random delay helps prevent the stations from experiencing another collision during transmission.
Minimal delays in data delivery.
Network Media Control

50. 3 factors that should be considered when implementing Layer 2 protocols
Host mobility
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network
172.16.192.160