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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. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. minimizing of collisions b. division into broadcast domains
A. flow control b. session establishment c. numbering and sequencing
Hub
A. Physical b. Data Link

2. After an ethernet collision - which device has priority to transmit data?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Any device whose backoff timer expires first.
SMB
Flash

3. What command is used to change the default name to 'Costas'?
To enable a receiving host to forward the data to the appropriate application.
Router(config)# hostname Costas
Signal loss can be experienced.
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

4. Which type of cable is most often associated w/ fiber-optic cable?
A. MTA b. SMTP
A backbone cable.
A. Cat5 UTP b. Cat6 UTP
The MAC protocol can be very simple.

5. What info is found in the TCP and UDP header info?
Source and Destination Ports
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. application b. presentation c. session d. transmision e. network f. data link g. physical
Static

6. 2 most commonly used media types in ethernet networks
Application Layer
A. copper UTP b. optical fiber
A. they initiate data exchanges b. they may upload data to servers
Network Layer Packet

7. 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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
80 (HTTP)
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

8. At which layers of the OSI model does ethernet operate?
Host mobility
80 (HTTP)
A. physical layer b. DLL layer
A. the router will discard the packet b. the router will send a time exceeded message to the source host

9. What are key considering factors when grouping hosts into common networks?
Next-Hop Address
Network Layer Packet
Is used by the server to resolve names.
A. purpose b. geographic location c. ownership

10. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
It has expanded adressing capabilities.
Minimal delays in data delivery.
A. HTTP b. HTTPS

11. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
80 (HTTP)
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Router(config)# interface FastEthernet 0/1

12. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. show startup-config b. show running-config
RJ-45
Wireless
Physical

13. 3 facts about the network portion of an IPv4 address
Console interface
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
As the commands are entered.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

14. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
Collisions can decrease network performance.
Network Access
MAC

15. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
IP is not properly installed
0 to 1023
SMB

16. 3 measures of data transfer
0 to 1023
A. goodput b. throughput c. bandwidth
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. perform degradation b. security issues c. host identification

17. Network Protocols
DNS
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. Physical b. Data Link
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

18. 3 statements about routes and their use
It uses lasers as the light source.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Switch
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. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
Network Access
OTDR
A. router b. firewall

20. What type of network cable is used between a terminal and a console port?
Router(config)# hostname Costas
255.255.255.224
It has expanded adressing capabilities.
Rollover cable

21. What information is added during encapsulation at OSI Layer 3?
The MAC protocol can be very simple.
Source and Destination IP address
Network
Window Size

22. 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?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
8
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Application Layer

23. If you have a full-duplex operational network - what can happen?
A. servers b. routers c. network printers
No collisions will occur on this link.
Hub
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

24. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
Transport
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. not affected by EMI of RFI b. most expensive type of LAN cabling

25. Which combination of keys can be used to interrupt a ping or traceroute process?
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.
Ctrl + Shift + 6
Network Media Control

26. What makes fiber preferable to copper for interconnecting buildings?
It does not support encryption.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The address of the router that the host will use to 'get to the other side'.
A physical topology.

27. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Rollover cable
A. enable mode b. priviledge executive mode
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Console interface

28. What is a protocol that provides connectionless network layer services?
Network
IP Protocol
Any device whose backoff timer expires first.
32 bits

29. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
Show Interfaces
OTDR
The packets will be delivered and reassembled at destination.

30. 3 functions of the upper data link sublayer in the OSI model
Supports error detection.
Rollover cable
No collisions will occur on this link.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

31. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Application Layer
UTP
The address of the router that the host will use to 'get to the other side'.

32. 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. perform degradation b. security issues c. host identification
Twisting of the cables
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Host A

33. In business LANs - which connector is used w/ twisted-pair networking cable?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
RJ-45
A physical topology.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

34. What is the role of the OSI Application Layer?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
It provides interface between applications on either end of the network.
Window Size
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

35. 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?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Identify processes or services that are communicating with end devices.
They must wait until the first hosts finish transfering the media.
Supports error detection.

36. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network portion
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. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself

37. What is PDU?
Logical Link Control sublayer
The destination host address.
Show Interfaces
Is a layer of specific encapsulation.

38. During a TCP session - if packets arrive out of order - what will happen?
A. performance degradation b. security issues c. host identification
0 to 1023
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The packets will be delivered and reassembled at destination.

39. What are 2 protocols for transfering web resources?
It provides interface between applications on either end of the network.
Network Media Control
A backbone cable.
A. HTTP b. HTTPS

40. Which characteristics describe fiber optic cable?
A. MTA b. SMTP
The MAC protocol can be very simple.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Window Size

41. To make a console connection from a comp to a Cisco router - what cable should be used?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. DNS b. SMTP c. POP
Rollover cable
Hosts return to listen-before-transmit mode.

42. What are 3 pieces of info about a route contained in a routing table?
A. perform degradation b. security issues c. host identification
A. next-hop b. metric/interface c. destination network address
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Any device whose backoff timer expires first.

43. What is the function of the DLL?
Signal loss can be experienced.
Hub
It provides for the exchange of data over a common local media.
255.255.255.224

44. What is the primary purpose of ARP?
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
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
Resolve IPv4 addresses to MAC addresses.

45. What is the primary function of encapsulating packets into frames?
A. performance degradation b. security issues c. host identification
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
32 bits
To facilitate the entry and exit of data on media.

46. What command can be used to determine if the router has experienced any input or output errors?
Network portion
A. servers b. routers c. network printers
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
Show Interfaces

47. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
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
Rollover cable
A. low overhead b. connectionless

48. What is a drawback of the CSMA/CD access method?
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.
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
Collisions can decrease network performance.

49. What determines the method of media access control?
0 to 1023
Network Layer Packet
A. media sharing b. logical topology
Is used by the server to resolve names.

50. 2 functions of encapsulation
No collisions will occur on this link.
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. Physical b. Data Link
2046