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. 3 terms that define the forms of help available within the Cisco IOS
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Is a layer of specific encapsulation.
Transport
A. hot keys b. context-sensitive c. command syntax check

2. If you have a small network w/ 3 computers...
Identify processes or services that are communicating with end devices.
0 to 1023
255.255.255.0
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

3. 2 features that make switches preferable to hubs
They must wait until the first hosts finish transfering the media.
A. minimizing of collisions b. division into broadcast domains
A. performance degradation b. security issues c. host identification
Network portion

4. Important characteristic of UDP
It uses lasers as the light source.
The packets will be delivered and reassembled at destination.
Destination is not contacted before a packet is sent.
Minimal delays in data delivery.

5. What are 2 commands used to view a host routing table?
UTP
A. router b. firewall
A. netstat -r b. route PRINT
Wireless

6. What is a characteristic of a logical point-to-point topology?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. DB 60 b. Winchester 15-pin c. smart serial
The MAC protocol can be very simple.
To enable a receiving host to forward the data to the appropriate application.

7. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
UDP
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. low overhead b. connectionless

8. What do end devices do?
A. MTA b. SMTP
Console
Originate data flow.
255.255.255.224

9. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Physical
UDP
A. media sharing b. logical topology

10. What are 2 email components used to forward mail between servers?
Create signals that represent the bits in each frame for the media.
The address of the router that the host will use to 'get to the other side'.
A. MTA b. SMTP
Identify processes or services that are communicating with end devices.

11. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Fiber
Logical Link Control sublayer
Network address
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

12. 3 statements about routes and their use
Ctrl + Shift + 6
A. router b. firewall
A. copper UTP b. optical fiber
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

13. What is a default gateway address?

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14. What is the purpose of the preamble in an ethernet frame?
Network Access
Supports error detection.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
2046

15. Network Protocols
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network address
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

16. 3 protocols that operate in the application layer
When connecting a host to a switch.
A. DNS b. SMTP c. POP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. minimizing of collisions b. division into broadcast domains

17. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
A. MTA b. SMTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host mobility

18. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. next-hop b. metric/interface c. destination network address
Destination Network Address
A default gateway (router).
Originate data flow.

19. At which layers of the OSI model does ethernet operate?
Console
UTP
A. perform degradation b. security issues c. host identification
A. physical layer b. DLL layer

20. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. DNS b. SMTP c. POP
Hub
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network portion

21. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
To facilitate the entry and exit of data on media.
Supports error detection.
Switch
DNS

22. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
IP is not properly installed
A. it has centralized administration b. security is easier to enforce
Binary ANDing
The physical address is added.

23. What layer encapsulates segments into packets?
Network Access
TCP initializes the sequence numbers for the sessions.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Layer

24. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Flash
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
UDP

25. What can be a problem that is reduced by adding end-to-end addressing?
A. MTA b. SMTP
A. show startup-config b. show running-config
It reduces unnecessary broadcasts.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

26. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Time-to-live (TTL)
A. low overhead b. connectionless
Ctrl + Shift + 6
Fiber

27. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Twisting of the cables

28. What is a drawback of the CSMA/CD access method?
Console interface
Collisions can decrease network performance.
It does not support encryption.
A. copper UTP b. optical fiber

29. 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?
255.255.255.224
A. DB 60 b. Winchester 15-pin c. smart serial
8
80 (HTTP)

30. Why are port numbers included in the TCP header of a segment?
A. perform degradation b. security issues c. host identification
To enable a receiving host to forward the data to the appropriate application.
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.

31. What event occurs during the 3-way handshake?
A. Physical b. Data Link
TCP initializes the sequence numbers for the sessions.
A. perform degradation b. security issues c. host identification
A. the router will discard the packet b. the router will send a time exceeded message to the source host

32. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
The magnetic field around the adjacent pairs of wire.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
255.255.255.224
UDP

33. What is the proper order of the OSI Layers?
A. show startup-config b. show running-config
Is used by the server to resolve names.
Minimal delays in data delivery.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

34. What is the purpose of resource records in DNS?
Network
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Next-Hop Address
Is used by the server to resolve names.

35. Which device is used to create or divide broadcast domains?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Router
0 to 1023
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

36. 3 properties of peer-2-peer applications
TCP initializes the sequence numbers for the sessions.
0 to 1023
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
A. DNS b. SMTP c. POP

37. 2 functions of encapsulation
A. HTTP b. HTTPS
Signal loss can be experienced.
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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

38. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
A. copper UTP b. optical fiber
Next-Hop Address
Network

39. 3 primary functions of the data link layer encapsulation
255.255.255.224
A. addressing b. error detection c. frame delimiting
A. flow control b. session establishment c. numbering and sequencing
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

40. What statements describe the logical token-passing topology?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To prevent the receiver from being overwhelmed by incoming data.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Switch

41. 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?
It provides interface between applications on either end of the network.
Host A
TCP initializes the sequence numbers for the sessions.
A. show startup-config b. show running-config

42. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. hot keys b. context-sensitive c. command syntax check
Hosts return to listen-before-transmit mode.
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. 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

43. What can get you to an outside network?
RJ-45
A default gateway (router).
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Flash

44. What are 3 pieces of info about a route contained in a routing table?
Physical
UDP
A. next-hop b. metric/interface c. destination network address
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

45. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Network Layer
The physical address is added.
A. decentralized resources b. resource sharing w/o a dedicated server

46. 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?
Supports error detection.
A. Physical b. Data Link
Router(config)# hostname Costas
172.16.192.160

47. Which type of cable is most often associated w/ fiber-optic cable?
Create signals that represent the bits in each frame for the media.
A backbone cable.
No collisions will occur on this link.
80 (HTTP)

48. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
80 (HTTP)
A. media sharing b. logical topology
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

49. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
To enable a receiving host to forward the data to the appropriate application.
A. non-deterministic b. less overhead c. collisions exist
Network Media Control
SMB

50. Which 2 options represent Layer 4 addressing?
They must wait until the first hosts finish transfering the media.
A. enable mode b. priviledge executive mode
UDP
A. identifies the communicating applications b. identifies multiple conversations between the hosts