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 command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Network address
Router(config)# interface FastEthernet 0/1
A. perform degradation b. security issues c. host identification
Application Layer

2. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Fiber
A. router b. firewall
80 (HTTP)

3. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
A. servers b. routers c. network printers
Logical Link Control sublayer
A. they initiate data exchanges b. they may upload data to servers

4. What is the primary function of encapsulating packets into frames?
Source and Destination Ports
The packets will be delivered and reassembled at destination.
Rollover cable
To facilitate the entry and exit of data on media.

5. What are 2 features of User Diagram Protocol (UDP)?
RJ-45
A. Cat5 UTP b. Cat6 UTP
A. router b. firewall
A. low overhead b. connectionless

6. What determines the method of media access control?
A. media sharing b. logical topology
Identify processes or services that are communicating with end devices.
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. decentralized resources b. resource sharing w/o a dedicated server

7. 3 statements about the role of routers in the network
It provides interface between applications on either end of the network.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Ctrl + Shift + 6
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

8. 2 characteristics of peer-2-peer
Time-to-live (TTL)
It does not support encryption.
A. decentralized resources b. resource sharing w/o a dedicated server
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

9. Why are port numbers included in the TCP header of a segment?
Console
172.16.192.160
To enable a receiving host to forward the data to the appropriate application.
RJ-45

10. Which IP packet field will prevent endless loops?
When connecting a host to a switch.
Time-to-live (TTL)
255.255.255.0
Physical

11. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Next-Hop Address
A backbone cable.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

12. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. low overhead b. connectionless
Logical Link Control sublayer
Network Media Control
FTP

13. What is the primary reason for developing IPv6?
It has expanded adressing capabilities.
Console
Router(config)# hostname Costas
32 bits

14. Group of hosts that have identical bit patterns in the high order bits of their addresses
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
32 bits
FTP

15. When do changes take effect in a Cisco router?
It uses support from the lower layers to distinguish between connections to the service.
A. Physical b. Data Link
As the commands are entered.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

16. What information is added during encapsulation at OSI Layer 3?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Source and Destination IP address
To enable a receiving host to forward the data to the appropriate application.
The packets will be delivered and reassembled at destination.

17. What is the purpose of a default gateway?
Resolve IPv4 addresses to MAC addresses.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

18. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. decentralized resources b. resource sharing w/o a dedicated server
IP is not properly installed
Network portion
Console

19. 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?
The physical address is added.
It reduces unnecessary broadcasts.
OTDR
172.16.192.160

20. What layer encapsulates segments into packets?
SMB
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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
Network Layer

21. What can you identify when you examine the Network Layer header?
The destination host address.
Console interface
The MAC protocol can be very simple.
It has expanded adressing capabilities.

22. statements of IP adressing
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. addressing b. error detection c. frame delimiting
A. next-hop b. metric/interface c. destination network address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

23. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Destination is not contacted before a packet is sent.
A. next-hop b. metric/interface c. destination network address
Identify processes or services that are communicating with end devices.
Supports error detection.

24. 3 statements about routes and their use
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. media sharing b. logical topology
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

25. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer Packet
Ctrl + Shift + 6
A. hot keys b. context-sensitive c. command syntax check

26. What are the advantages of using a client-server model?
Is used by the server to resolve names.
A. performance degradation b. security issues c. host identification
A. it has centralized administration b. security is easier to enforce
A physical topology.

27. What is the primary purpose of Layer 4?
It reduces unnecessary broadcasts.
Identify processes or services that are communicating with end devices.
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
Router(config)# interface FastEthernet 0/1

28. There are too many broadcasts on switches - what can be done?
A. application b. services
A. replace a switch w/ a router b. subnet the new networks
172.16.192.160
Console interface

29. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
It uses lasers as the light source.
Rollover cable
UDP
A. low overhead b. connectionless

30. 2 features that make switches preferable to hubs
The packets will be delivered and reassembled at destination.
Application Layer
It has expanded adressing capabilities.
A. minimizing of collisions b. division into broadcast domains

31. 2 most commonly used media types in ethernet networks
Host mobility
A. copper UTP b. optical fiber
Supports error detection.
The magnetic field around the adjacent pairs of wire.

32. After an ethernet collision - which device has priority to transmit data?
A. netstat -r b. route PRINT
Minimal delays in data delivery.
Window Size
Any device whose backoff timer expires first.

33. What are 2 common characteristics associated w/ dynamic routing protocols?
Window Size
Host mobility
Any device whose backoff timer expires first.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

34. What is a protocol that provides connectionless network layer services?
IP Protocol
32 bits
A. application b. services
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

35. 3 common problems w/ a large network
80 (HTTP)
Window Size
A. performance degradation b. security issues c. host identification
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

36. When is a straight-through cable used in a network?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
When connecting a host to a switch.
Transport
A. addressing b. error detection c. frame delimiting

37. 3 terms that define the forms of help available within the Cisco IOS
The magnetic field around the adjacent pairs of wire.
Router(config)# hostname Costas
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. hot keys b. context-sensitive c. command syntax check

38. What networking devices are recommended to be assigned static IP addresses?
TCP initializes the sequence numbers for the sessions.
Application Layer
A random delay helps prevent the stations from experiencing another collision during transmission.
A. servers b. routers c. network printers

39. 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. flow control b. session establishment c. numbering and sequencing
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Console interface
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

40. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
FTP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. copper UTP b. optical fiber
0 to 1023

41. What is the primary purpose of ARP?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. perform degradation b. security issues c. host identification
Resolve IPv4 addresses to MAC addresses.
TCP initializes the sequence numbers for the sessions.

42. Statements that describe LAN
Wireless
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. application b. presentation c. session d. transmision e. network f. data link g. physical
A. hot keys b. context-sensitive c. command syntax check

43. What event occurs during the 3-way handshake?
Transport
As the commands are entered.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
TCP initializes the sequence numbers for the sessions.

44. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
It provides interface between applications on either end of the network.
A. show startup-config b. show running-config
A backbone cable.

45. What type of routing uses information that is manually entered into the routing table?
Any device whose backoff timer expires first.
Static
A. next-hop b. metric/interface c. destination network address
As the commands are entered.

46. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
RJ-45
0 to 1023
The packets will be delivered and reassembled at destination.

47. 3 protocols that operate in the application layer
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. DNS b. SMTP c. POP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
SMB

48. During encapsulation - what happens in the Data Link Layer?
Identify processes or services that are communicating with end devices.
The physical address is added.
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
Ctrl + Shift + 6

49. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Console
A. decentralized resources b. resource sharing w/o a dedicated server

50. How many bits make up an IPv4 address?
32 bits
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
TCP initializes the sequence numbers for the sessions.
Ctrl + Shift + 6