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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. 2 most commonly used media types in ethernet networks
Window Size
A. copper UTP b. optical fiber
Switch
A. goodput b. throughput c. bandwidth

2. What info is found in the TCP and UDP header info?
Source and Destination Ports
Resolve IPv4 addresses to MAC addresses.
Wireless
Ctrl + Shift + 6

3. Which layer supplies services and allows user interface?
A. next-hop b. metric/interface c. destination network address
Any device whose backoff timer expires first.
Application Layer
As the commands are entered.

4. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
OTDR
A. performance degradation b. security issues c. host identification
It does not support encryption.
Physical

5. After an ethernet collision - which device has priority to transmit data?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Any device whose backoff timer expires first.
Collisions can decrease network performance.
80 (HTTP)

6. 3 measures of data transfer
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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)
A. goodput b. throughput c. bandwidth

7. At which layers of the OSI model does ethernet operate?
Wireless
A. physical layer b. DLL layer
A. netstat -r b. route PRINT
255.255.255.0

8. What 2 type of cables would most commonly be used for new runs?
MAC
IP Protocol
It has expanded adressing capabilities.
A. Cat5 UTP b. Cat6 UTP

9. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Binary ANDing
Minimal delays in data delivery.
Source Port

10. What is a characteristic of a logical point-to-point topology?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
2046
The MAC protocol can be very simple.
It provides interface between applications on either end of the network.

11. What makes fiber preferable to copper for interconnecting buildings?
A. it has centralized administration b. security is easier to enforce
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

12. 3 characteristics of valid Ethernet Layer 2 addresses
A. servers b. routers c. network printers
OTDR
To facilitate the entry and exit of data on media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

13. Default Gateway is incorrect on the host - What is the impact on the communications?
Network Layer
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. replace a switch w/ a router b. subnet the new networks
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media

14. What are the advantages of using a client-server model?
8
A. it has centralized administration b. security is easier to enforce
A. performance degradation b. security issues c. host identification
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

15. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Signal loss can be experienced.
Source and Destination IP address
A. low overhead b. connectionless

16. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
Source and Destination IP address
A. show startup-config b. show running-config
Network address

17. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Rollover cable
Binary ANDing
172.16.192.160
Create signals that represent the bits in each frame for the media.

18. 2 characteristics of peer-2-peer
It provides interface between applications on either end of the network.
Source Port
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. decentralized resources b. resource sharing w/o a dedicated server

19. What are 2 common characteristics associated w/ dynamic routing protocols?
A. servers b. routers c. network printers
Logical Link Control sublayer
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. it has centralized administration b. security is easier to enforce

20. What is the primary rope of the physical layer in transmitting data?
Network Layer
Minimal delays in data delivery.
Window Size
Create signals that represent the bits in each frame for the media.

21. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
Router(config)# hostname Costas
Time-to-live (TTL)
The destination host address.

22. What type of routing uses information that is manually entered into the routing table?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Static
It uses support from the lower layers to distinguish between connections to the service.
SSH

23. 3 terms that define the forms of help available within the Cisco IOS
Host mobility
A. it has centralized administration b. security is easier to enforce
A. hot keys b. context-sensitive c. command syntax check
Switch

24. What are 2 features of User Diagram Protocol (UDP)?
A. they initiate data exchanges b. they may upload data to servers
DNS
Show Interfaces
A. low overhead b. connectionless

25. What determines the method of media access control?
UTP
Logical Link Control sublayer
A. copper UTP b. optical fiber
A. media sharing b. logical topology

26. If you have a full-duplex operational network - what can happen?
A. decentralized resources b. resource sharing w/o a dedicated server
The MAC protocol can be very simple.
A backbone cable.
No collisions will occur on this link.

27. Which device is used to create or divide broadcast domains?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
MAC
Router
A. DB 60 b. Winchester 15-pin c. smart serial

28. What causes crosstalk within cable pairs when using UTP?
As the commands are entered.
A. physical layer b. DLL layer
The magnetic field around the adjacent pairs of wire.
Network address

29. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
It uses support from the lower layers to distinguish between connections to the service.
Rollover cable
A. goodput b. throughput c. bandwidth

30. When a device is moved from one network to the other...?
Switch
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Network Layer Packet
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

31. When a network service fails - which port is most often used to access a router for management purposes?
Identify the device that allows local network computers to communicate w/ devices in other networks.
The packets will be delivered and reassembled at destination.
A. router b. firewall
Console

32. What method of signal transmission uses radio waves to carry signals?
They must wait until the first hosts finish transfering the media.
Wireless
32 bits
Logical Link Control sublayer

33. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Router(config)# interface FastEthernet 0/1
Network address
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.

34. At which layer of the TCP/IP model does ethernet operate?
UTP
Network Access
To prevent the receiver from being overwhelmed by incoming data.
Router(config)# interface FastEthernet 0/1

35. What is the primary purpose of Layer 4?
A. router b. firewall
Network Layer Packet
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
Identify processes or services that are communicating with end devices.

36. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
It provides interface between applications on either end of the network.
80 (HTTP)
A. Physical b. Data Link

37. Why are port numbers included in the TCP header of a segment?
The packets will be delivered and reassembled at destination.
Transport
To enable a receiving host to forward the data to the appropriate application.
It reduces unnecessary broadcasts.

38. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. MTA b. SMTP
A. addressing b. error detection c. frame delimiting
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

39. What describes the purpose of default route?
Network Layer
TCP initializes the sequence numbers for the sessions.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Any device whose backoff timer expires first.

40. What is an automated service that matches resource names w/ required IP addresses?
DNS
FTP
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

41. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Resolve IPv4 addresses to MAC addresses.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

42. What characteristic of an UTP helps reduce interference?
Physical
A. next-hop b. metric/interface c. destination network address
Twisting of the cables
Destination Network Address

43. 3 properties of peer-2-peer applications
Network Layer Packet
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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
SMB

44. 3 common problems w/ a large network
Host A
A. performance degradation b. security issues c. host identification
OTDR
It does not support encryption.

45. What is a drawback of the CSMA/CD access method?
A. show startup-config b. show running-config
8
Collisions can decrease network performance.
Resolve IPv4 addresses to MAC addresses.

46. Why is flow control used for TCP data transfer?
A. HTTP b. HTTPS
A. netstat -r b. route PRINT
To prevent the receiver from being overwhelmed by incoming data.
A. show startup-config b. show running-config

47. Which characteristics describe fiber optic cable?
A random delay helps prevent the stations from experiencing another collision during transmission.
Originate data flow.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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

48. When do changes take effect in a Cisco router?
DNS
Network Layer
As the commands are entered.
Network Media Control

49. What are 2 protocols for transfering web resources?
A. flow control b. session establishment c. numbering and sequencing
A. decentralized resources b. resource sharing w/o a dedicated server
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. HTTP b. HTTPS

50. What does the IEEE 802.2 standard represent in Ethernet technologies?
UTP
It uses lasers as the light source.
Logical Link Control sublayer
A. identifies the communicating applications b. identifies multiple conversations between the hosts