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 statements about the role of routers in the network
A. decentralized resources b. resource sharing w/o a dedicated server
A. addressing b. error detection c. frame delimiting
255.255.255.224
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

2. What are 2 forms of application layer software?
A. application b. services
Destination is not contacted before a packet is sent.
Hosts return to listen-before-transmit mode.
IP is not properly installed

3. If you have a small network w/ 3 computers...
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
2046
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. Physical b. Data Link

4. What correctly describes a MAC address?
Switch
Router(config)# interface FastEthernet 0/1
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

5. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
TCP initializes the sequence numbers for the sessions.
It uses support from the lower layers to distinguish between connections to the service.
RJ-45

6. Why are port numbers included in the TCP header of a segment?
Application Layer
A. goodput b. throughput c. bandwidth
32 bits
To enable a receiving host to forward the data to the appropriate application.

7. What can you identify when you examine the Network Layer header?
Rollover cable
A. DNS b. SMTP c. POP
Hosts return to listen-before-transmit mode.
The destination host address.

8. What 2 type of cables would most commonly be used for new runs?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. minimizing of collisions b. division into broadcast domains
Router
A. Cat5 UTP b. Cat6 UTP

9. Which IP packet field will prevent endless loops?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Minimal delays in data delivery.
Time-to-live (TTL)
Resolve IPv4 addresses to MAC addresses.

10. What are 3 properties of contention-based media access for a shared media?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It has expanded adressing capabilities.
A. they initiate data exchanges b. they may upload data to servers
A. non-deterministic b. less overhead c. collisions exist

11. What device can check for faults - integrity and performance of media?
Collisions can decrease network performance.
Logical Link Control sublayer
OTDR
A backbone cable.

12. What is a characteristic of a single-mode fiber-optic cable?
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
Network Access
To facilitate the entry and exit of data on media.
It uses lasers as the light source.

13. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
80 (HTTP)
Physical
Network Media Control
The magnetic field around the adjacent pairs of wire.

14. What is an effect of improperly applying a network cable connector?
Collisions can decrease network performance.
Signal loss can be experienced.
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

15. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
IP is not properly installed
Physical
To facilitate the entry and exit of data on media.

16. What is the primary rope of the physical layer in transmitting data?
DNS
Static
Create signals that represent the bits in each frame for the media.
A. next-hop b. metric/interface c. destination network address

17. What is the role of the OSI Application Layer?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
0 to 1023
A. minimizing of collisions b. division into broadcast domains
It provides interface between applications on either end of the network.

18. What are 2 email components used to forward mail between servers?
Router(config)# hostname Costas
Destination is not contacted before a packet is sent.
TCP initializes the sequence numbers for the sessions.
A. MTA b. SMTP

19. Default Gateway is incorrect on the host - What is the impact on the communications?
255.255.255.0
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Destination is not contacted before a packet is sent.
A. replace a switch w/ a router b. subnet the new networks

20. 3 facts about the network portion of an IPv4 address
Console
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The address of the router that the host will use to 'get to the other side'.
DNS

21. What determines the method of media access control?
A. media sharing b. logical topology
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. next-hop b. metric/interface c. destination network address

22. 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
It reduces unnecessary broadcasts.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
SSH
A. application b. services

23. What is dinamically selected by the source host when forwarding data?
Source Port
8
A. flow control b. session establishment c. numbering and sequencing
A. goodput b. throughput c. bandwidth

24. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. performance degradation b. security issues c. host identification
A. application b. services
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
Logical Link Control sublayer

25. What info is found in the TCP and UDP header info?
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
Source and Destination Ports
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
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

26. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Network Layer Packet
255.255.255.0
It does not support encryption.
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. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
As the commands are entered.
A. enable mode b. priviledge executive mode
They must wait until the first hosts finish transfering the media.
It has expanded adressing capabilities.

28. 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?
Host A
Network
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
172.16.192.160

29. 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
Host mobility
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. servers b. routers c. network printers

30. What are 3 common problems w/ large networks?
DNS
A. perform degradation b. security issues c. host identification
SSH
8

31. 3 features that allow TCP to realibly and accurately track the transmission of data
Network Access
A. physical layer b. DLL layer
A. flow control b. session establishment c. numbering and sequencing
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

32. 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
0 to 1023
A. it has centralized administration b. security is easier to enforce
A. copper UTP b. optical fiber

33. What do the intermediary devices in the network do?
Destination Network Address
Router(config)# hostname Costas
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

34. To make a console connection from a comp to a Cisco router - what cable should be used?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. show startup-config b. show running-config
Rollover cable

35. 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
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Ctrl + Shift + 6
Originate data flow.

36. What do you need to use for an initial configuration on a Cisco router?
Console interface
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

37. What is a component of a routing table entry?
They must wait until the first hosts finish transfering the media.
Identify processes or services that are communicating with end devices.
Next-Hop Address
Destination Network Address

38. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Switch
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
Source and Destination IP address

39. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
OTDR
255.255.255.0
A. servers b. routers c. network printers
0 to 1023

40. What is an automated service that matches resource names w/ required IP addresses?
A. replace a switch w/ a router b. subnet the new networks
Host A
DNS
When connecting a host to a switch.

41. What can get you to an outside network?
Console
A default gateway (router).
Create signals that represent the bits in each frame for the media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

42. 3 factors that should be considered when implementing Layer 2 protocols
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
Window Size

43. What is PDU?
Is a layer of specific encapsulation.
Fiber
Destination is not contacted before a packet is sent.
Router(config)# hostname Costas

44. 2 characteristics of peer-2-peer
A. physical layer b. DLL layer
A. decentralized resources b. resource sharing w/o a dedicated server
Network portion
A default gateway (router).

45. What is the function of the DLL?
It provides for the exchange of data over a common local media.
A. goodput b. throughput c. bandwidth
The packets will be delivered and reassembled at destination.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

46. Network Protocols
A random delay helps prevent the stations from experiencing another collision during transmission.
Router
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Source and Destination IP address

47. What command can be used to determine if the router has experienced any input or output errors?
A. application b. services
Static
To prevent the receiver from being overwhelmed by incoming data.
Show Interfaces

48. Intermediary devices used to implement security between networks
A. router b. firewall
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Rollover cable

49. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
FTP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
SMB
MAC

50. What are the advantages of using a client-server model?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
UTP
A. it has centralized administration b. security is easier to enforce
0 to 1023