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. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Supports error detection.
Hub
A. HTTP b. HTTPS
A default gateway (router).

2. If there is a graphic representation of a company network wiring and equipment - What is this called?
255.255.255.0
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
No collisions will occur on this link.
A physical topology.

3. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
A. router b. firewall
It provides for the exchange of data over a common local media.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

4. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
TCP initializes the sequence numbers for the sessions.
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
A. it has centralized administration b. security is easier to enforce

5. Which combination of keys can be used to interrupt a ping or traceroute process?
A. minimizing of collisions b. division into broadcast domains
255.255.255.0
Ctrl + Shift + 6
A. DB 60 b. Winchester 15-pin c. smart serial

6. When is a straight-through cable used in a network?
A. Cat5 UTP b. Cat6 UTP
When connecting a host to a switch.
Host A
The physical address is added.

7. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Window Size
As the commands are entered.

8. What is dinamically selected by the source host when forwarding data?
Destination Network Address
DNS
Source Port
A. low overhead b. connectionless

9. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Console
UDP
A. performance degradation b. security issues c. host identification
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

10. How does the application layer on a server process multiple client requests for services?
A. netstat -r b. route PRINT
It has expanded adressing capabilities.
It uses support from the lower layers to distinguish between connections to the service.
172.16.192.160

11. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
It has expanded adressing capabilities.
A. low overhead b. connectionless
Resolve IPv4 addresses to MAC addresses.
Supports error detection.

12. What determines the method of media access control?
A backbone cable.
A. router b. firewall
It reduces unnecessary broadcasts.
A. media sharing b. logical topology

13. What connectors are commonly associated w/ Cisco's V.35 serial cables?
SMB
2046
It uses support from the lower layers to distinguish between connections to the service.
A. DB 60 b. Winchester 15-pin c. smart serial

14. What are key considering factors when grouping hosts into common networks?
Console
It reduces unnecessary broadcasts.
A. purpose b. geographic location c. ownership
Signal loss can be experienced.

15. What are 2 common characteristics associated w/ dynamic routing protocols?
Time-to-live (TTL)
TCP initializes the sequence numbers for the sessions.
Network Media Control
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

16. How many bits make up an IPv4 address?
Host A
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. perform degradation b. security issues c. host identification
32 bits

17. What are the advantages of using a client-server model?
A. non-deterministic b. less overhead c. collisions exist
172.16.192.160
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. it has centralized administration b. security is easier to enforce

18. There are too many broadcasts on switches - what can be done?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
To enable a receiving host to forward the data to the appropriate application.
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
A. replace a switch w/ a router b. subnet the new networks

19. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Destination is not contacted before a packet is sent.
Router(config)# hostname Costas
It provides interface between applications on either end of the network.
Window Size

20. When a device is moved from one network to the other...?
It reduces unnecessary broadcasts.
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
IP Protocol
To enable a receiving host to forward the data to the appropriate application.

21. Important characteristic of UDP
Supports error detection.
FTP
Minimal delays in data delivery.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

22. What is a default gateway address?

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23. Which 2 options represent Layer 4 addressing?
Hub
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It reduces unnecessary broadcasts.
To facilitate the entry and exit of data on media.

24. 3 properties of peer-2-peer applications
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
OTDR
It uses support from the lower layers to distinguish between connections to the service.
RJ-45

25. 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?
Next-Hop Address
A. show startup-config b. show running-config
A. router b. firewall
A. performance degradation b. security issues c. host identification

26. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
Supports error detection.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. replace a switch w/ a router b. subnet the new networks
It uses support from the lower layers to distinguish between connections to the service.

27. 2 characteristics of peer-2-peer
Ctrl + Shift + 6
A. decentralized resources b. resource sharing w/o a dedicated server
Application Layer
Flash

28. 3 protocols that operate in the application layer
Network Access
A. DNS b. SMTP c. POP
A. router b. firewall
Source Port

29. What command can be used to determine if the router has experienced any input or output errors?
FTP
Show Interfaces
A. hot keys b. context-sensitive c. command syntax check
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

30. What layer encapsulates segments into packets?
Signal loss can be experienced.
Source and Destination IP address
Collisions can decrease network performance.
Network Layer

31. What do the intermediary devices in the network do?
Destination Network Address
A. larger address space b. data types and classes of service c. authentication and encryption
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

32. 3 common problems w/ a large network
UDP
A. performance degradation b. security issues c. host identification
255.255.255.0
80 (HTTP)

33. What type of network cable is used between a terminal and a console port?
Rollover cable
A. goodput b. throughput c. bandwidth
A. servers b. routers c. network printers
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

34. What describes the purpose of default route?
A. MTA b. SMTP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
8
IP is not properly installed

35. What does the IEEE 802.2 standard represent in Ethernet technologies?
Window Size
A. low overhead b. connectionless
Logical Link Control sublayer
To facilitate the entry and exit of data on media.

36. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Application Layer
Source and Destination IP address
Hub

37. What is an automated service that matches resource names w/ required IP addresses?
255.255.255.224
Twisting of the cables
Hosts return to listen-before-transmit mode.
DNS

38. 3 facts about the network portion of an IPv4 address
Static
A. flow control b. session establishment c. numbering and sequencing
The address of the router that the host will use to 'get to the other side'.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

39. Network Protocols
Network Layer Packet
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. addressing b. error detection c. frame delimiting
Network

40. Which characteristics describe fiber optic cable?
A. DNS b. SMTP c. POP
It uses lasers as the light source.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A random delay helps prevent the stations from experiencing another collision during transmission.

41. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. performance degradation b. security issues c. host identification
A. minimizing of collisions b. division into broadcast domains
RJ-45
80 (HTTP)

42. 3 characteristics of valid Ethernet Layer 2 addresses
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Source and Destination Ports
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

43. What method of signal transmission uses radio waves to carry signals?
A. performance degradation b. security issues c. host identification
Is a layer of specific encapsulation.
Wireless
A. servers b. routers c. network printers

44. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. next-hop b. metric/interface c. destination network address
A default gateway (router).
Destination Network Address

45. What are 2 email components used to forward mail between servers?
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
A. MTA b. SMTP
Binary ANDing
A. hot keys b. context-sensitive c. command syntax check

46. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
0 to 1023
Network address
Network portion
Router

47. What characteristic of an UTP helps reduce interference?
A random delay helps prevent the stations from experiencing another collision during transmission.
Twisting of the cables
Wireless
RJ-45

48. What are 3 properties of contention-based media access for a shared media?
Destination is not contacted before a packet is sent.
A. non-deterministic b. less overhead c. collisions exist
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

49. When a network service fails - which port is most often used to access a router for management purposes?
Console
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It provides for the exchange of data over a common local media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

50. What do end devices do?
A. performance degradation b. security issues c. host identification
Originate data flow.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. replace a switch w/ a router b. subnet the new networks