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. 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?
8
A. larger address space b. data types and classes of service c. authentication and encryption
A. low overhead b. connectionless
Collisions can decrease network performance.

2. What is the purpose of the preamble in an ethernet frame?
OTDR
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. larger address space b. data types and classes of service c. authentication and encryption

3. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
2046
Hub
Source and Destination Ports

4. Which combination of keys can be used to interrupt a ping or traceroute process?
Network Access
Ctrl + Shift + 6
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network address

5. What method of signal transmission uses radio waves to carry signals?
A. replace a switch w/ a router b. subnet the new networks
Wireless
A. performance degradation b. security issues c. host identification
A. purpose b. geographic location c. ownership

6. What device can check for faults - integrity and performance of media?
OTDR
Network address
A. HTTP b. HTTPS
A. non-deterministic b. less overhead c. collisions exist

7. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
A. goodput b. throughput c. bandwidth
Window Size
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

8. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Host A
A. enable mode b. priviledge executive mode
Is used by the server to resolve names.

9. 3 factors that should be considered when implementing Layer 2 protocols
Twisting of the cables
Fiber
Supports error detection.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

10. 3 characteristics of valid Ethernet Layer 2 addresses
Time-to-live (TTL)
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Ctrl + Shift + 6
When connecting a host to a switch.

11. At which layer of the TCP/IP model does ethernet operate?
A. next-hop b. metric/interface c. destination network address
Time-to-live (TTL)
A. show startup-config b. show running-config
Network Access

12. In business LANs - which connector is used w/ twisted-pair networking cable?
Console
RJ-45
A backbone cable.
It does not support encryption.

13. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Fiber
When connecting a host to a switch.
Network Layer Packet
Network Access

14. 3 measures of data transfer
2046
RJ-45
Network portion
A. goodput b. throughput c. bandwidth

15. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Destination is not contacted before a packet is sent.
DNS
The destination host address.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

16. 3 statements about the role of routers in the network
Rollover cable
Destination Network Address
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

17. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
The magnetic field around the adjacent pairs of wire.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. replace a switch w/ a router b. subnet the new networks

18. 2 characteristics of peer-2-peer
OTDR
A random delay helps prevent the stations from experiencing another collision during transmission.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. decentralized resources b. resource sharing w/o a dedicated server

19. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
255.255.255.224
Show Interfaces
Next-Hop Address

20. 3 facts about the network portion of an IPv4 address
Network Media Control
To facilitate the entry and exit of data on media.
Rollover cable
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

21. What event occurs during the 3-way handshake?
It provides for the exchange of data over a common local media.
A. next-hop b. metric/interface c. destination network address
TCP initializes the sequence numbers for the sessions.
Signal loss can be experienced.

22. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
Twisting of the cables
The destination host address.
Network Layer

23. Which portion of the network layer address does a router use to forward packets?
MAC
Network portion
The magnetic field around the adjacent pairs of wire.
To enable a receiving host to forward the data to the appropriate application.

24. What are 2 forms of application layer software?
No collisions will occur on this link.
A. decentralized resources b. resource sharing w/o a dedicated server
A. HTTP b. HTTPS
A. application b. services

25. Intermediary devices used to implement security between networks
A. it has centralized administration b. security is easier to enforce
A. router b. firewall
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
It uses support from the lower layers to distinguish between connections to the service.

26. 3 features of IPv6
SMB
A. larger address space b. data types and classes of service c. authentication and encryption
A. minimizing of collisions b. division into broadcast domains
Hub

27. 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?
2046
Switch
When connecting a host to a switch.
A. HTTP b. HTTPS

28. What is the role of MTA in handling email?
Destination is not contacted before a packet is sent.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. media sharing b. logical topology
Router

29. Why is flow control used for TCP data transfer?
Show Interfaces
To prevent the receiver from being overwhelmed by incoming data.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. netstat -r b. route PRINT

30. At which layers of the OSI model does ethernet operate?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It uses lasers as the light source.
Fiber
A. physical layer b. DLL layer

31. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. application b. services
To prevent the receiver from being overwhelmed by incoming data.
A. replace a switch w/ a router b. subnet the new networks

32. What are 3 properties of contention-based media access for a shared media?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Transport
The destination host address.
A. non-deterministic b. less overhead c. collisions exist

33. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Switch
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. purpose b. geographic location c. ownership
Rollover cable

34. How does the application layer on a server process multiple client requests for services?
A. next-hop b. metric/interface c. destination network address
It uses support from the lower layers to distinguish between connections to the service.
Source and Destination Ports
A. DNS b. SMTP c. POP

35. Which type of cable is most often associated w/ fiber-optic cable?
To prevent the receiver from being overwhelmed by incoming data.
Create signals that represent the bits in each frame for the media.
Destination Network Address
A backbone cable.

36. 3 features that allow TCP to realibly and accurately track the transmission of data
It has expanded adressing capabilities.
Physical
A. flow control b. session establishment c. numbering and sequencing
Time-to-live (TTL)

37. Which characteristics describe fiber optic cable?
32 bits
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Ctrl + Shift + 6
A. application b. presentation c. session d. transmision e. network f. data link g. physical

38. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Static
Router(config)# interface FastEthernet 0/1
Rollover cable
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

39. What are key considering factors when grouping hosts into common networks?
A. performance degradation b. security issues c. host identification
Router
A. purpose b. geographic location c. ownership
Hub

40. What determines the method of media access control?
Minimal delays in data delivery.
A. media sharing b. logical topology
Destination is not contacted before a packet is sent.
A. DB 60 b. Winchester 15-pin c. smart serial

41. What is a protocol that provides connectionless network layer services?
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
IP Protocol
A. purpose b. geographic location c. ownership
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

42. How many bits make up an IPv4 address?
Host A
32 bits
Logical Link Control sublayer
Console

43. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Network
Destination is not contacted before a packet is sent.
Static

44. What is the primary reason for developing IPv6?
OTDR
TCP initializes the sequence numbers for the sessions.
Network Media Control
It has expanded adressing capabilities.

45. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
A. next-hop b. metric/interface c. destination network address
255.255.255.0
0 to 1023

46. What makes fiber preferable to copper for interconnecting buildings?
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Console
A. identifies the communicating applications b. identifies multiple conversations between the hosts

47. What are the advantages of using a client-server model?
Physical
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
2046
A. it has centralized administration b. security is easier to enforce

48. Why are port numbers included in the TCP header of a segment?
Network Layer Packet
UTP
To enable a receiving host to forward the data to the appropriate application.
Host A

49. Important characteristic of UDP
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
A backbone cable.
Source Port
Minimal delays in data delivery.

50. Which layer supplies services and allows user interface?
Ctrl + Shift + 6
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
UTP
Application Layer