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. What method of signal transmission uses radio waves to carry signals?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Minimal delays in data delivery.
Wireless
172.16.192.160

2. Which device is used to create or divide broadcast domains?
Router
OTDR
A. flow control b. session establishment c. numbering and sequencing
Show Interfaces

3. What kind of problems are caused by excessive broadcast traffic on network segments?
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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
SMB
Network portion

4. How many bits make up an IPv4 address?
Logical Link Control sublayer
255.255.255.0
32 bits
A. identifies the communicating applications b. identifies multiple conversations between the hosts

5. What is the purpose of a default gateway?
Collisions can decrease network performance.
Host A
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. servers b. routers c. network printers

6. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. MTA b. SMTP
8
Ctrl + Shift + 6

7. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. non-deterministic b. less overhead c. collisions exist
Collisions can decrease network performance.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. the router will discard the packet b. the router will send a time exceeded message to the source host

8. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Binary ANDing
A. HTTP b. HTTPS
A. performance degradation b. security issues c. host identification

9. What are 2 forms of application layer software?
SSH
IP is not properly installed
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. application b. services

10. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. hot keys b. context-sensitive c. command syntax check
A. copper UTP b. optical fiber
Window Size
Network Layer

11. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Router(config)# hostname Costas
A. minimizing of collisions b. division into broadcast domains
The destination host address.

12. 2 functions of encapsulation
A. Cat5 UTP b. Cat6 UTP
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. not affected by EMI of RFI b. most expensive type of LAN cabling
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

13. 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?
The address of the router that the host will use to 'get to the other side'.
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.
2046

14. After an ethernet collision - which device has priority to transmit data?
A. non-deterministic b. less overhead c. collisions exist
Identify processes or services that are communicating with end devices.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Any device whose backoff timer expires first.

15. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
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. application b. services
It reduces unnecessary broadcasts.

16. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
The magnetic field around the adjacent pairs of wire.
Application Layer
Fiber

17. When destination network is not in the routing table - What are 2 actions the router might take?
A. purpose b. geographic location c. ownership
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. DNS b. SMTP c. POP
The MAC protocol can be very simple.

18. There are too many broadcasts on switches - what can be done?
A backbone cable.
Network address
A. replace a switch w/ a router b. subnet the new networks
Transport

19. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
0 to 1023
A random delay helps prevent the stations from experiencing another collision during transmission.
To prevent the receiver from being overwhelmed by incoming data.
A. addressing b. error detection c. frame delimiting

20. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. it has centralized administration b. security is easier to enforce
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
UTP

21. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
A physical topology.
A. flow control b. session establishment c. numbering and sequencing
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

22. What type of network cable is used between a terminal and a console port?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It uses lasers as the light source.
Rollover cable
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

23. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Originate data flow.
SMB
Destination Network Address
Application Layer

24. What is the primary purpose of Layer 4?
A. Cat5 UTP b. Cat6 UTP
Console interface
Identify processes or services that are communicating with end devices.
A. router b. firewall

25. What is a component of a routing table entry?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Next-Hop Address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. non-deterministic b. less overhead c. collisions exist

26. 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. router b. firewall
A. servers b. routers c. network printers
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

27. 3 functions of the upper data link sublayer in the OSI model
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A random delay helps prevent the stations from experiencing another collision during transmission.
A. they initiate data exchanges b. they may upload data to servers

28. 2 characteristics of clients in data networks
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
0 to 1023
A. they initiate data exchanges b. they may upload data to servers

29. 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?
It uses support from the lower layers to distinguish between connections to the service.
A. next-hop b. metric/interface c. destination network address
A. enable mode b. priviledge executive mode
172.16.192.160

30. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A default gateway (router).
Collisions can decrease network performance.
Router

31. 3 factors that should be considered when implementing Layer 2 protocols
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
255.255.255.224
Identify the device that allows local network computers to communicate w/ devices in other networks.

32. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Resolve IPv4 addresses to MAC addresses.
Identify processes or services that are communicating with end devices.

33. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Hub
A. hot keys b. context-sensitive c. command syntax check
Identify the device that allows local network computers to communicate w/ devices in other networks.
Switch

34. If there is a graphic representation of a company network wiring and equipment - What is this called?
Show Interfaces
When connecting a host to a switch.
A physical topology.
A. perform degradation b. security issues c. host identification

35. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
It provides interface between applications on either end of the network.
Hub
172.16.192.160
A. DNS b. SMTP c. POP

36. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
It provides interface between applications on either end of the network.
Resolve IPv4 addresses to MAC addresses.
Router(config)# interface FastEthernet 0/1
Physical

37. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
80 (HTTP)
Ctrl + Shift + 6
As the commands are entered.

38. What is the purpose of the preamble in an ethernet frame?
A. show startup-config b. show running-config
Signal loss can be experienced.
Is used by the server to resolve names.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

39. 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?
A. purpose b. geographic location c. ownership
It uses support from the lower layers to distinguish between connections to the service.
A. show startup-config b. show running-config
To prevent the receiver from being overwhelmed by incoming data.

40. What is the function of the DLL?
A. larger address space b. data types and classes of service c. authentication and encryption
It provides for the exchange of data over a common local media.
Router(config)# interface FastEthernet 0/1
Source and Destination Ports

41. What do you need to use for an initial configuration on a Cisco router?
Console interface
255.255.255.0
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Layer Packet

42. What device can check for faults - integrity and performance of media?
Network Layer Packet
OTDR
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
IP Protocol

43. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
It does not support encryption.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
UTP

44. An admin needs to keep contents private - which access method should he use?
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
SSH
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
8

45. What is an automated service that matches resource names w/ required IP addresses?
DNS
The physical address is added.
Network portion
It does not support encryption.

46. What info is found in the TCP and UDP header info?
Supports error detection.
A. minimizing of collisions b. division into broadcast domains
Source and Destination Ports
A. the router will discard the packet b. the router will send a time exceeded message to the source host

47. What statements describe the logical token-passing topology?
Router
Next-Hop Address
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Collisions can decrease network performance.

48. 3 common problems w/ a large network
MAC
Network Media Control
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. performance degradation b. security issues c. host identification

49. If you have a full-duplex operational network - what can happen?
It provides for the exchange of data over a common local media.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. HTTP b. HTTPS
No collisions will occur on this link.

50. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. MTA b. SMTP
Host A