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. Which 2 options represent Layer 4 addressing?
OTDR
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Signal loss can be experienced.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

2. 3 features of IPv6
As the commands are entered.
A. larger address space b. data types and classes of service c. authentication and encryption
A. enable mode b. priviledge executive mode
IP Protocol

3. What makes fiber preferable to copper for interconnecting buildings?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network portion
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. At which layers of the OSI model does ethernet operate?
A. HTTP b. HTTPS
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
A. physical layer b. DLL layer
Identify processes or services that are communicating with end devices.

5. Important characteristic of UDP
Minimal delays in data delivery.
A. enable mode b. priviledge executive mode
A. next-hop b. metric/interface c. destination network address
A. DNS b. SMTP c. POP

6. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
A random delay helps prevent the stations from experiencing another collision during transmission.
FTP
The magnetic field around the adjacent pairs of wire.

7. 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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. addressing b. error detection c. frame delimiting
IP is not properly installed

8. What do the intermediary devices in the network do?
Supports error detection.
IP Protocol
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Ctrl + Shift + 6

9. What is a disadvantage of Telnet?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Destination Network Address
It does not support encryption.
IP is not properly installed

10. 3 statements about routes and their use
It does not support encryption.
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
To enable a receiving host to forward the data to the appropriate application.
A. goodput b. throughput c. bandwidth

11. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A. replace a switch w/ a router b. subnet the new networks
A. media sharing b. logical topology
Supports error detection.

12. What is the purpose of the preamble in an ethernet frame?
It has expanded adressing capabilities.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It provides interface between applications on either end of the network.
Router(config)# hostname Costas

13. What can you identify when you examine the Network Layer header?
A. DNS b. SMTP c. POP
A. non-deterministic b. less overhead c. collisions exist
FTP
The destination host address.

14. Which combination of keys can be used to interrupt a ping or traceroute process?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The MAC protocol can be very simple.
Ctrl + Shift + 6
Any device whose backoff timer expires first.

15. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
A. flow control b. session establishment c. numbering and sequencing
Static
SSH

16. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. it has centralized administration b. security is easier to enforce
MAC
Console
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

17. What type of network cable is used between a terminal and a console port?
80 (HTTP)
Rollover cable
A random delay helps prevent the stations from experiencing another collision during transmission.
SMB

18. Why is flow control used for TCP data transfer?
Fiber
To prevent the receiver from being overwhelmed by incoming data.
Show Interfaces
A. MTA b. SMTP

19. What are 3 pieces of info about a route contained in a routing table?
To enable a receiving host to forward the data to the appropriate application.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. next-hop b. metric/interface c. destination network address
A. not affected by EMI of RFI b. most expensive type of LAN cabling

20. What correctly describes a MAC address?
DNS
Twisting of the cables
Wireless
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

21. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
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
255.255.255.0
Is used by the server to resolve names.

22. What is a default gateway address?

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23. What type of routing uses information that is manually entered into the routing table?
FTP
Wireless
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Static

24. Which IP packet field will prevent endless loops?
Static
A. larger address space b. data types and classes of service c. authentication and encryption
Time-to-live (TTL)
A. router b. firewall

25. 3 features that allow TCP to realibly and accurately track the transmission of data
To prevent the receiver from being overwhelmed by incoming data.
The destination host address.
A. flow control b. session establishment c. numbering and sequencing
A. larger address space b. data types and classes of service c. authentication and encryption

26. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Hub
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
UTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

27. What can be a problem that is reduced by adding end-to-end addressing?
A. non-deterministic b. less overhead c. collisions exist
It reduces unnecessary broadcasts.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
255.255.255.224

28. 2 features that make switches preferable to hubs
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 default gateway (router).
A. minimizing of collisions b. division into broadcast domains
TCP initializes the sequence numbers for the sessions.

29. What is the proper order of the OSI Layers?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Logical Link Control sublayer
Collisions can decrease network performance.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. Intermediary devices used to implement security between networks
Network address
A physical topology.
A. router b. firewall
UTP

31. What is the primary purpose of ARP?
A. DB 60 b. Winchester 15-pin c. smart serial
Resolve IPv4 addresses to MAC addresses.
Collisions can decrease network performance.
Host A

32. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
To prevent the receiver from being overwhelmed by incoming data.
The address of the router that the host will use to 'get to the other side'.
32 bits

33. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. larger address space b. data types and classes of service c. authentication and encryption
The MAC protocol can be very simple.
A. Physical b. Data Link
A. replace a switch w/ a router b. subnet the new networks

34. What is PDU?
Is a layer of specific encapsulation.
A. enable mode b. priviledge executive mode
Resolve IPv4 addresses to MAC addresses.
A. replace a switch w/ a router b. subnet the new networks

35. If you have a full-duplex operational network - what can happen?
Router(config)# hostname Costas
Is a layer of specific encapsulation.
Is used by the server to resolve names.
No collisions will occur on this link.

36. What is a benefit of a WAN?
Minimal delays in data delivery.
Switch
Console interface
Host mobility

37. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
Fiber
The destination host address.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

38. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
The physical address is added.
Network Layer Packet
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.

39. Which layer supplies services and allows user interface?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Fiber
Application Layer
SSH

40. 3 primary functions of the data link layer encapsulation
Network Media Control
A. addressing b. error detection c. frame delimiting
8
A. DB 60 b. Winchester 15-pin c. smart serial

41. When a network service fails - which port is most often used to access a router for management purposes?
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
Console
A. DB 60 b. Winchester 15-pin c. smart serial
When connecting a host to a switch.

42. What application layer protocol is used to support file transfers between client and server?
Identify processes or services that are communicating with end devices.
FTP
A. non-deterministic b. less overhead c. collisions exist
A. netstat -r b. route PRINT

43. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Physical
Time-to-live (TTL)
A. DB 60 b. Winchester 15-pin c. smart serial
A backbone cable.

44. What event occurs during the 3-way handshake?
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
Physical
TCP initializes the sequence numbers for the sessions.
Time-to-live (TTL)

45. What is the purpose of the TCP/IP Network Application Layer?
Next-Hop Address
A. DNS b. SMTP c. POP
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media
Network Media Control

46. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Signal loss can be experienced.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Flash

47. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Resolve IPv4 addresses to MAC addresses.
A. goodput b. throughput c. bandwidth
A physical topology.
Supports error detection.

48. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. servers b. routers c. network printers
Is used by the server to resolve names.
It has expanded adressing capabilities.
A random delay helps prevent the stations from experiencing another collision during transmission.

49. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Hosts return to listen-before-transmit mode.
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
Physical

50. What are 2 email components used to forward mail between servers?
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
A. MTA b. SMTP
Fiber