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. 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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network Layer

2. 3 statements about the role of routers in the network
A. performance degradation b. security issues c. host identification
Destination Network Address
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

3. At which layers of the OSI model does ethernet operate?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. purpose b. geographic location c. ownership
A. physical layer b. DLL 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

4. What is an automated service that matches resource names w/ required IP addresses?
IP is not properly installed
A. application b. presentation c. session d. transmision e. network f. data link g. physical
DNS
Rollover cable

5. When is a straight-through cable used in a network?
When connecting a host to a switch.
The physical address is added.
A. application b. services
Network portion

6. What is the primary purpose of ARP?
Wireless
Destination Network Address
IP is not properly installed
Resolve IPv4 addresses to MAC addresses.

7. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
IP Protocol
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
Transport

8. What info is found in the TCP and UDP header info?
255.255.255.224
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. router b. firewall
Source and Destination Ports

9. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A default gateway (router).
Signal loss can be experienced.
Switch
A. replace a switch w/ a router b. subnet the new networks

10. How many bits make up an IPv4 address?
32 bits
Twisting of the cables
It provides for the exchange of data over a common local media.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

11. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Fiber
Is a layer of specific encapsulation.

12. What do end devices do?
RJ-45
A default gateway (router).
Originate data flow.
UDP

13. Important characteristic of UDP
Minimal delays in data delivery.
A. performance degradation b. security issues c. host identification
0 to 1023
Flash

14. Which combination of keys can be used to interrupt a ping or traceroute process?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

15. Which characteristics describe fiber optic cable?
To prevent the receiver from being overwhelmed by incoming data.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The address of the router that the host will use to 'get to the other side'.
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. What is the purpose of the TCP/IP Network Application Layer?
A. hot keys b. context-sensitive c. command syntax check
Hub
8
Network Media Control

17. What command is used to change the default name to 'Costas'?
It uses lasers as the light source.
Router(config)# hostname Costas
A. addressing b. error detection c. frame delimiting
IP is not properly installed

18. 3 statements about routes and their use
Flash
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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

19. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
A. purpose b. geographic location c. ownership
A. enable mode b. priviledge executive mode
It uses support from the lower layers to distinguish between connections to the service.

20. An admin needs to keep contents private - which access method should he use?
Source Port
SSH
Any device whose backoff timer expires first.
SMB

21. What do the intermediary devices in the network do?
A. application b. services
Resolve IPv4 addresses to MAC addresses.
It uses support from the lower layers to distinguish between connections to the service.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

22. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
TCP initializes the sequence numbers for the sessions.
They must wait until the first hosts finish transfering the media.
A physical topology.
Binary ANDing

23. What are 3 properties of contention-based media access for a shared media?
Router(config)# interface FastEthernet 0/1
A. non-deterministic b. less overhead c. collisions exist
Router
A. not affected by EMI of RFI b. most expensive type of LAN cabling

24. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
No collisions will occur on this link.
255.255.255.0
To prevent the receiver from being overwhelmed by incoming data.

25. What do you need to use for an initial configuration on a Cisco router?
RJ-45
Console interface
The destination host address.
It reduces unnecessary broadcasts.

26. 3 facts about the network portion of an IPv4 address
Network portion
A. purpose b. geographic location c. ownership
Flash
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

27. What networking devices are recommended to be assigned static IP addresses?
Switch
Originate data flow.
A. servers b. routers c. network printers
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

28. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
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
It provides for the exchange of data over a common local media.
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

29. What characteristic of an UTP helps reduce interference?
Twisting of the cables
A. it has centralized administration b. security is easier to enforce
172.16.192.160
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

30. If there is a graphic representation of a company network wiring and equipment - What is this called?
Rollover cable
A physical topology.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

31. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
Host A
A. perform degradation b. security issues c. host identification
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

32. What are 3 pieces of info about a route contained in a routing table?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. goodput b. throughput c. bandwidth
Network Layer Packet
A. next-hop b. metric/interface c. destination network address

33. What is the primary rope of the physical layer in transmitting data?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. enable mode b. priviledge executive mode
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
Create signals that represent the bits in each frame for the media.

34. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
8
MAC
Network Media Control

35. When destination network is not in the routing table - What are 2 actions the router might take?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Network Layer Packet
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

36. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
It provides interface between applications on either end of 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
The destination host address.
Identify the device that allows local network computers to communicate w/ devices in other networks.

37. After an ethernet collision - which device has priority to transmit data?
2046
Any device whose backoff timer expires first.
Destination is not contacted before a packet is sent.
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

38. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
SSH
Rollover cable
DNS

39. What event occurs during the 3-way handshake?
Originate data flow.
Application Layer
TCP initializes the sequence numbers for the sessions.
Flash

40. 2 features that make switches preferable to hubs
Source and Destination Ports
Next-Hop Address
A. minimizing of collisions b. division into broadcast domains
As the commands are entered.

41. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. servers b. routers c. network printers
Minimal delays in data delivery.
255.255.255.0

42. Which layer supplies services and allows user interface?
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. show startup-config b. show running-config
Application Layer
A. netstat -r b. route PRINT

43. Which IP packet field will prevent endless loops?
A physical topology.
Hosts return to listen-before-transmit mode.
Network Layer Packet
Time-to-live (TTL)

44. How does the application layer on a server process multiple client requests for services?
It provides for the exchange of data over a common local media.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Transport
It uses support from the lower layers to distinguish between connections to the service.

45. What layer encapsulates segments into packets?
Rollover cable
Network Layer
Source and Destination IP address
Resolve IPv4 addresses to MAC addresses.

46. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Host A
UDP
No collisions will occur on this link.
A. they initiate data exchanges b. they may upload data to servers

47. What are 3 common problems w/ large networks?
The destination host address.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
255.255.255.0
A. perform degradation b. security issues c. host identification

48. When do changes take effect in a Cisco router?
Network Access
Logical Link Control sublayer
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
As the commands are entered.

49. What statements describe the logical token-passing topology?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Signal loss can be experienced.
Minimal delays in data delivery.

50. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
255.255.255.224
A random delay helps prevent the stations from experiencing another collision during transmission.
A. netstat -r b. route PRINT