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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. What is the function of the DLL?
172.16.192.160
Network Layer
A. media sharing b. logical topology
It provides for the exchange of data over a common local media.

2. What is the purpose of resource records in DNS?
Time-to-live (TTL)
Is used by the server to resolve names.
Create signals that represent the bits in each frame for the media.
A. goodput b. throughput c. bandwidth

3. 3 statements about routes and their use
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
The packets will be delivered and reassembled at destination.
IP Protocol
OTDR

4. Group of hosts that have identical bit patterns in the high order bits of their addresses
TCP initializes the sequence numbers for the sessions.
A. Physical b. Data Link
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network

5. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. minimizing of collisions b. division into broadcast domains
Network address
IP Protocol

6. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Show Interfaces
Transport
Wireless
A. application b. presentation c. session d. transmision e. network f. data link g. physical

7. What are 2 protocols for transfering web resources?
Is used by the server to resolve names.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. HTTP b. HTTPS
Signal loss can be experienced.

8. What characteristic of an UTP helps reduce interference?
Twisting of the cables
It uses support from the lower layers to distinguish between connections to the service.
Binary ANDing
Application Layer

9. What kind of problems are caused by excessive broadcast traffic on network segments?
TCP initializes the sequence numbers for the sessions.
IP Protocol
Hub
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

10. statements of IP adressing
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Static
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
Binary ANDing

11. Why are port numbers included in the TCP header of a segment?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
To enable a receiving host to forward the data to the appropriate application.
Console
UTP

12. During encapsulation - what happens in the Data Link Layer?
A. decentralized resources b. resource sharing w/o a dedicated server
UDP
Rollover cable
The physical address is added.

13. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. physical layer b. DLL layer
0 to 1023
A. netstat -r b. route PRINT
Transport

14. What is a component of a routing table entry?
Next-Hop Address
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
Show Interfaces
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

15. 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?
Destination Network Address
A. show startup-config b. show running-config
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Hosts return to listen-before-transmit mode.

16. 2 characteristics of peer-2-peer
A. application b. services
Next-Hop Address
A. decentralized resources b. resource sharing w/o a dedicated server
They must wait until the first hosts finish transfering the media.

17. Important characteristic of UDP
A. low overhead b. connectionless
RJ-45
Minimal delays in data delivery.
UDP

18. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
172.16.192.160
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Window Size

19. In business LANs - which connector is used w/ twisted-pair networking cable?
A. HTTP b. HTTPS
To prevent the receiver from being overwhelmed by incoming data.
RJ-45
A. MTA b. SMTP

20. Network Protocols
As the commands are entered.
Network
A. enable mode b. priviledge executive mode
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

21. At which layer of the TCP/IP model does ethernet operate?
A. router b. firewall
Hosts return to listen-before-transmit mode.
255.255.255.0
Network Access

22. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
80 (HTTP)
A. Cat5 UTP b. Cat6 UTP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

23. What application layer protocol is used to support file transfers between client and server?
FTP
Network address
Resolve IPv4 addresses to MAC addresses.
TCP initializes the sequence numbers for the sessions.

24. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
The packets will be delivered and reassembled at destination.
It uses lasers as the light source.
Console interface

25. What determines the method of media access control?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. it has centralized administration b. security is easier to enforce
A. media sharing b. logical topology
Time-to-live (TTL)

26. 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?
80 (HTTP)
To facilitate the entry and exit of data on media.
2046
Is used by the server to resolve names.

27. What can get you to an outside network?
Logical Link Control sublayer
Application Layer
A default gateway (router).
The packets will be delivered and reassembled at destination.

28. 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 portion
A. replace a switch w/ a router b. subnet the new networks
No collisions will occur on this link.

29. 2 most commonly used media types in ethernet networks
The packets will be delivered and reassembled at destination.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. copper UTP b. optical fiber
Source and Destination IP address

30. 3 statements about the role of routers in the network
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
To facilitate the entry and exit of data on media.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

31. What is the primary purpose of Layer 4?
A. router b. firewall
Identify processes or services that are communicating with end devices.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

32. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. addressing b. error detection c. frame delimiting
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. decentralized resources b. resource sharing w/o a dedicated server
Signal loss can be experienced.

33. 2 functions of encapsulation
Rollover cable
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The magnetic field around the adjacent pairs of wire.
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

34. When is a straight-through cable used in a network?
Hub
A. low overhead b. connectionless
Transport
When connecting a host to a switch.

35. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
Static
Signal loss can be experienced.
Show Interfaces

36. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
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
32 bits
Router
Binary ANDing

37. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
Router(config)# hostname Costas
The physical address is added.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

38. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Window Size
IP is not properly installed

39. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
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
When connecting a host to a switch.
A physical topology.

40. 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?
To enable a receiving host to forward the data to the appropriate application.
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
Signal loss can be experienced.
8

41. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Identify processes or services that are communicating with end devices.
Physical
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A random delay helps prevent the stations from experiencing another collision during transmission.

42. What is the purpose of a default gateway?
It reduces unnecessary broadcasts.
A. DB 60 b. Winchester 15-pin c. smart serial
The physical address is added.
Identify the device that allows local network computers to communicate w/ devices in other networks.

43. 3 functions of the upper data link sublayer in the OSI model
It uses lasers as the light source.
255.255.255.0
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

44. 3 statements of media acess control
A. media sharing b. logical topology
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
IP Protocol
Supports error detection.

45. What is the primary function of encapsulating packets into frames?
Network Layer
To facilitate the entry and exit of data on media.
Fiber
Show Interfaces

46. What do end devices do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Originate data flow.
Console interface
The packets will be delivered and reassembled at destination.

47. At which layers of the OSI model does ethernet operate?
Signal loss can be experienced.
Destination is not contacted before a packet is sent.
A. physical layer b. DLL layer
Network Media Control

48. What device can check for faults - integrity and performance of media?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Hosts return to listen-before-transmit mode.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
OTDR

49. What type of network cable is used between a terminal and a console port?
A default gateway (router).
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Rollover cable

50. What type of routing uses information that is manually entered into the routing table?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Static
Application Layer
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