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. During a TCP session - if packets arrive out of order - what will happen?
It has expanded adressing capabilities.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The packets will be delivered and reassembled at destination.
DNS

2. Which 2 options represent Layer 4 addressing?
Destination is not contacted before a packet is sent.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Show Interfaces

3. What device can check for faults - integrity and performance of media?
They must wait until the first hosts finish transfering the media.
OTDR
Network Media Control
A. show startup-config b. show running-config

4. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
It does not support encryption.
Is a layer of specific encapsulation.
Physical
Hosts return to listen-before-transmit mode.

5. 3 statements about routes and their use
Network
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
A. DB 60 b. Winchester 15-pin c. smart serial
Is used by the server to resolve names.

6. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
A. Cat5 UTP b. Cat6 UTP
OTDR
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

7. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
32 bits
Hosts return to listen-before-transmit mode.
Router(config)# interface FastEthernet 0/1
Network Layer Packet

8. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A default gateway (router).
Wireless
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. 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. DNS b. SMTP c. POP
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The physical address is added.

10. What are 2 forms of application layer software?
DNS
A. Cat5 UTP b. Cat6 UTP
A. application b. services
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

11. When a network service fails - which port is most often used to access a router for management purposes?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Console interface
The address of the router that the host will use to 'get to the other side'.
Console

12. Which IP packet field will prevent endless loops?
Source Port
Time-to-live (TTL)
Source and Destination Ports
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

13. An admin needs to keep contents private - which access method should he use?
SSH
Hub
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Source Port

14. What causes crosstalk within cable pairs when using UTP?
A. non-deterministic b. less overhead c. collisions exist
The magnetic field around the adjacent pairs of wire.
A. Cat5 UTP b. Cat6 UTP
SMB

15. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Resolve IPv4 addresses to MAC addresses.
IP Protocol

16. If you have a small network w/ 3 computers...
0 to 1023
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
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
80 (HTTP)

17. Why are port numbers included in the TCP header of a segment?
Wireless
Source and Destination Ports
Network
To enable a receiving host to forward the data to the appropriate application.

18. 3 features that allow TCP to realibly and accurately track the transmission of data
Destination is not contacted before a packet is sent.
Flash
A. flow control b. session establishment c. numbering and sequencing
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

19. 3 properties of peer-2-peer applications
It provides for the exchange of data over a common local media.
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Access

20. When is a straight-through cable used in a network?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
When connecting a host to a switch.
32 bits
A. HTTP b. HTTPS

21. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Collisions can decrease network performance.
2046
80 (HTTP)
Console

22. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Wireless
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
MAC

23. What is the role of MTA in handling email?
0 to 1023
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. copper UTP b. optical fiber

24. What makes fiber preferable to copper for interconnecting buildings?
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'.
It uses lasers as the light source.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

25. What is dinamically selected by the source host when forwarding data?
To enable a receiving host to forward the data to the appropriate application.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Physical
Source Port

26. 3 statements about the role of routers in the network
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. purpose b. geographic location c. ownership
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
No collisions will occur on this link.

27. 3 facts about the network portion of an IPv4 address
Physical
Ctrl + Shift + 6
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

28. 3 terms that define the forms of help available within the Cisco IOS
The address of the router that the host will use to 'get to the other side'.
A. hot keys b. context-sensitive c. command syntax check
Hosts return to listen-before-transmit mode.
Rollover cable

29. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Signal loss can be experienced.
SMB
Destination Network Address
MAC

30. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
The physical address is added.
A. servers b. routers c. network printers
A random delay helps prevent the stations from experiencing another collision during transmission.

31. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
UDP
Binary ANDing

32. At which layer of the TCP/IP model does ethernet operate?
When connecting a host to a switch.
32 bits
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
Network Access

33. What can you identify when you examine the Network Layer header?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Console
The destination host address.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

34. 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
Time-to-live (TTL)
Rollover cable
It has expanded adressing capabilities.

35. There are too many broadcasts on switches - what can be done?
It provides for the exchange of data over a common local media.
A. replace a switch w/ a router b. subnet the new networks
IP Protocol
The destination host address.

36. Which combination of keys can be used to interrupt a ping or traceroute process?
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
It provides for the exchange of data over a common local media.
The magnetic field around the adjacent pairs of wire.
Ctrl + Shift + 6

37. What is the purpose of a default gateway?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Flash
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. Physical b. Data Link

38. What is the primary reason for developing IPv6?
Network address
A. addressing b. error detection c. frame delimiting
It has expanded adressing capabilities.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

39. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Hosts return to listen-before-transmit mode.
255.255.255.224
A. larger address space b. data types and classes of service c. authentication and encryption

40. When do changes take effect in a Cisco router?
As the commands are entered.
RJ-45
80 (HTTP)
A. Cat5 UTP b. Cat6 UTP

41. What is PDU?
Is a layer of specific encapsulation.
Ctrl + Shift + 6
Rollover cable
It uses support from the lower layers to distinguish between connections to the service.

42. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
172.16.192.160
TCP initializes the sequence numbers for the sessions.
Flash

43. 3 measures of data transfer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The physical address is added.
A. copper UTP b. optical fiber
A. goodput b. throughput c. bandwidth

44. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
A. show startup-config b. show running-config
Host A
The MAC protocol can be very simple.
Network Media Control

45. What type of network cable is used between a terminal and a console port?
8
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
Rollover cable

46. What is the function of the DLL?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
They must wait until the first hosts finish transfering the media.
Create signals that represent the bits in each frame for the media.
It provides for the exchange of data over a common local media.

47. 3 statements of media acess control
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
DNS
IP is not properly installed
A. media sharing b. logical topology

48. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
OTDR

49. What is an effect of improperly applying a network cable connector?
A. MTA b. SMTP
A. DNS b. SMTP c. POP
80 (HTTP)
Signal loss can be experienced.

50. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Next-Hop Address
A. goodput b. throughput c. bandwidth
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1