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. How does the application layer on a server process multiple client requests for services?
The physical address is added.
It uses support from the lower layers to distinguish between connections to the service.
Signal loss can be experienced.
A. application b. services

2. 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?
A. next-hop b. metric/interface c. destination network address
Create signals that represent the bits in each frame for the media.
8
A. flow control b. session establishment c. numbering and sequencing

3. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Static
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Supports error detection.

4. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
It uses lasers as the light source.
UTP
0 to 1023

5. Which layer supplies services and allows user interface?
Application Layer
A default gateway (router).
Is a layer of specific encapsulation.
Network address

6. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
Source and Destination IP address
Wireless
The packets will be delivered and reassembled at destination.

7. 3 statements about the role of routers in the network
Network Layer
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
Router(config)# hostname Costas
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

8. How many bits make up an IPv4 address?
A. larger address space b. data types and classes of service c. authentication and encryption
A. perform degradation b. security issues c. host identification
32 bits
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

9. Which characteristics describe fiber optic cable?
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 default gateway (router).
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Signal loss can be experienced.

10. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Window Size
To facilitate the entry and exit of data on media.
IP Protocol

11. What is a component of a routing table entry?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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
Next-Hop Address
Destination Network Address

12. 3 statements about routes and their use
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. 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
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
Signal loss can be experienced.

13. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
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. not affected by EMI of RFI b. most expensive type of LAN cabling
2046

14. What are key considering factors when grouping hosts into common networks?
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
0 to 1023
A. purpose b. geographic location c. ownership

15. 3 terms that define the forms of help available within the Cisco IOS
Switch
A. hot keys b. context-sensitive c. command syntax check
A. next-hop b. metric/interface c. destination network address
RJ-45

16. When destination network is not in the routing table - What are 2 actions the router might take?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A backbone cable.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Wireless

17. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Wireless
Identify the device that allows local network computers to communicate w/ devices in other networks.
A random delay helps prevent the stations from experiencing another collision during transmission.
Next-Hop Address

18. Which 2 options represent Layer 4 addressing?
A default gateway (router).
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Signal loss can be experienced.
Resolve IPv4 addresses to MAC addresses.

19. Intermediary devices used to implement security between networks
Binary ANDing
A. router b. firewall
A. perform degradation b. security issues c. host identification
Physical

20. What command is used to change the default name to 'Costas'?
Fiber
Router(config)# hostname Costas
Network Layer
No collisions will occur on this link.

21. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. hot keys b. context-sensitive c. command syntax check
Console interface
Hub
It provides interface between applications on either end of the network.

22. 2 most commonly used media types in ethernet networks
A. flow control b. session establishment c. numbering and sequencing
A. copper UTP b. optical fiber
Network address
Host mobility

23. What are 2 protocols for transfering web resources?
Rollover cable
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. HTTP b. HTTPS
The magnetic field around the adjacent pairs of wire.

24. What type of routing uses information that is manually entered into the routing table?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Static
Application Layer
A. enable mode b. priviledge executive mode

25. During a TCP session - if packets arrive out of order - what will happen?
It uses support from the lower layers to distinguish between connections to the service.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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
The packets will be delivered and reassembled at destination.

26. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
RJ-45
Is used by the server to resolve names.
Supports error detection.
A. perform degradation b. security issues c. host identification

27. What event occurs during the 3-way handshake?
It provides for the exchange of data over a common local media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
TCP initializes the sequence numbers for the sessions.

28. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
The address of the router that the host will use to 'get to the other side'.
Physical
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
255.255.255.0

29. At which layer of the TCP/IP model does ethernet operate?
Identify processes or services that are communicating with end devices.
When connecting a host to a switch.
Network Access
Signal loss can be experienced.

30. What is the purpose of the preamble in an ethernet frame?
Console
Is a layer of specific encapsulation.
Rollover cable
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

31. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. perform degradation b. security issues c. host identification
Supports error detection.
Network Layer Packet

32. There are too many broadcasts on switches - what can be done?
Router
Console interface
The address of the router that the host will use to 'get to the other side'.
A. replace a switch w/ a router b. subnet the new networks

33. 3 characteristics of valid Ethernet Layer 2 addresses
A. DNS b. SMTP c. POP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
FTP
A. goodput b. throughput c. bandwidth

34. What info is found in the TCP and UDP header info?
Switch
Source and Destination Ports
The packets will be delivered and reassembled at destination.
The destination host address.

35. What is the purpose of a default gateway?
Identify processes or services that are communicating with end devices.
Any device whose backoff timer expires first.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host mobility

36. 3 primary functions of the data link layer encapsulation
To facilitate the entry and exit of data on media.
A. addressing b. error detection c. frame delimiting
RJ-45
Network Media Control

37. During encapsulation - what happens in the Data Link Layer?
32 bits
The physical address is added.
A. hot keys b. context-sensitive c. command syntax check
It provides for the exchange of data over a common local media.

38. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Collisions can decrease network performance.
A physical topology.
Minimal delays in data delivery.

39. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
UTP
Fiber
Create signals that represent the bits in each frame for the media.

40. 2 functions of encapsulation
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
DNS
Identify processes or services that are communicating with end devices.
Network Media Control

41. What are the advantages of using a client-server model?
To facilitate the entry and exit of data on media.
A. DB 60 b. Winchester 15-pin c. smart serial
A. they initiate data exchanges b. they may upload data to servers
A. it has centralized administration b. security is easier to enforce

42. What is dinamically selected by the source host when forwarding data?
Source Port
A. show startup-config b. show running-config
Physical
Any device whose backoff timer expires first.

43. What information is added during encapsulation at OSI Layer 3?
Network 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
Source and Destination IP address
A default gateway (router).

44. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Network
A random delay helps prevent the stations from experiencing another collision during transmission.
255.255.255.224
A. router b. firewall

45. What is the proper order of the OSI Layers?
SMB
Hub
FTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

46. What is a disadvantage of Telnet?
Twisting of the cables
Network portion
It has expanded adressing capabilities.
It does not support encryption.

47. When is a straight-through cable used in a network?
When connecting a host to a switch.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
80 (HTTP)
TCP initializes the sequence numbers for the sessions.

48. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
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. next-hop b. metric/interface c. destination network address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

49. What application layer protocol is used to support file transfers between client and server?
FTP
Network Media Control
It has expanded adressing capabilities.
To facilitate the entry and exit of data on media.

50. What is a benefit of a WAN?
Network portion
Host mobility
A. physical layer b. DLL layer
Destination is not contacted before a packet is sent.