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

2. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
Next-Hop Address
A backbone cable.
Any device whose backoff timer expires first.

3. If you have a full-duplex operational network - what can happen?
Twisting of the cables
Destination Network Address
No collisions will occur on this link.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

4. What are 2 commands used to view a host routing table?
They must wait until the first hosts finish transfering the media.
Time-to-live (TTL)
A. netstat -r b. route PRINT
172.16.192.160

5. What type of routing uses information that is manually entered into the routing table?
Source and Destination IP address
Static
A. enable mode b. priviledge executive mode
Create signals that represent the bits in each frame for the media.

6. 2 characteristics of clients in data networks
Twisting of the cables
SMB
A. they initiate data exchanges b. they may upload data to servers
Console interface

7. Which combination of keys can be used to interrupt a ping or traceroute process?
Source and Destination Ports
A. netstat -r b. route PRINT
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

8. 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
To facilitate the entry and exit of data on media.
Router(config)# hostname Costas
Rollover cable

9. If you have a small network w/ 3 computers...
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Is used by the server to resolve names.
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
Ctrl + Shift + 6

10. What is a characteristic of a single-mode fiber-optic cable?
A. application b. services
RJ-45
It uses lasers as the light source.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

11. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
Network address
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. router b. firewall

12. 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
A. flow control b. session establishment c. numbering and sequencing
A random delay helps prevent the stations from experiencing another collision during transmission.
Switch

13. What is the primary function of encapsulating packets into frames?
The destination host address.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To facilitate the entry and exit of data on media.
A. MTA b. SMTP

14. What is a protocol that provides connectionless network layer services?
A. larger address space b. data types and classes of service c. authentication and encryption
SSH
IP Protocol
Window Size

15. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
Network Access
Console interface
Router(config)# hostname Costas

16. What can you identify when you examine the Network Layer header?
Supports error detection.
The destination host address.
A. replace a switch w/ a router b. subnet the new networks
A. hot keys b. context-sensitive c. command syntax check

17. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. addressing b. error detection c. frame delimiting
Network Layer Packet
Transport

18. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
The packets will be delivered and reassembled at destination.
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. 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. Which characteristics describe fiber optic cable?
Create signals that represent the bits in each frame for the media.
A. flow control b. session establishment c. numbering and sequencing
A. goodput b. throughput c. bandwidth
A. not affected by EMI of RFI b. most expensive type of LAN cabling

20. 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
Hub
Collisions can decrease network performance.

21. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. enable mode b. priviledge executive mode
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A physical topology.

22. statements of IP adressing
A backbone cable.
A. decentralized resources b. resource sharing w/o a dedicated server
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. DNS b. SMTP c. POP

23. Why are port numbers included in the TCP header of a segment?
A. enable mode b. priviledge executive mode
To enable a receiving host to forward the data to the appropriate application.
Show Interfaces
A. Physical b. Data Link

24. When is a straight-through cable used in a network?
When connecting a host to a switch.
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
Application Layer
80 (HTTP)

25. 3 features of IPv6
SSH
MAC
The address of the router that the host will use to 'get to the other side'.
A. larger address space b. data types and classes of service c. authentication and encryption

26. At which layers of the OSI model does ethernet operate?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The physical address is added.
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. physical layer b. DLL layer

27. What method of signal transmission uses radio waves to carry signals?
Is used by the server to resolve names.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network Layer Packet
Wireless

28. What command can be used to determine if the router has experienced any input or output errors?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Show Interfaces
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Rollover cable

29. 3 statements of media acess control
The destination host address.
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
A. media sharing b. logical topology
Supports error detection.

30. What are key considering factors when grouping hosts into common networks?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
IP Protocol
A. purpose b. geographic location c. ownership
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

31. How many bits make up an IPv4 address?
It provides interface between applications on either end of the network.
32 bits
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
As the commands are entered.

32. What is an automated service that matches resource names w/ required IP addresses?
Static
Create signals that represent the bits in each frame for the media.
DNS
A backbone cable.

33. What is the primary purpose of ARP?
Window Size
Resolve IPv4 addresses to MAC addresses.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. they initiate data exchanges b. they may upload data to servers

34. What device can check for faults - integrity and performance of media?
Time-to-live (TTL)
OTDR
Ctrl + Shift + 6
A. purpose b. geographic location c. ownership

35. What is a disadvantage of Telnet?
As the commands are entered.
A. non-deterministic b. less overhead c. collisions exist
It does not support encryption.
Flash

36. 3 properties of peer-2-peer applications
OTDR
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. next-hop b. metric/interface c. destination network address
Rollover cable

37. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Transport
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
RJ-45
Hub

38. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Network portion
2046
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. purpose b. geographic location c. ownership

39. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Wireless
Switch
IP Protocol
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

40. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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
Time-to-live (TTL)
32 bits

41. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Is a layer of specific encapsulation.
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. application b. services

42. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Is a layer of specific encapsulation.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
When connecting a host to a switch.
Supports error detection.

43. What 2 type of cables would most commonly be used for new runs?
A. DNS b. SMTP c. POP
Rollover cable
The packets will be delivered and reassembled at destination.
A. Cat5 UTP b. Cat6 UTP

44. 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?
A. netstat -r b. route PRINT
Time-to-live (TTL)
172.16.192.160
Network

45. Which IP packet field will prevent endless loops?
A. decentralized resources b. resource sharing w/o a dedicated server
Time-to-live (TTL)
They must wait until the first hosts finish transfering the media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

46. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
They must wait until the first hosts finish transfering the media.
SMB
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
Rollover cable

47. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
UTP
To facilitate the entry and exit of data on media.
Router(config)# interface FastEthernet 0/1
Supports error detection.

48. There are too many broadcasts on switches - what can be done?
IP Protocol
Hub
A. replace a switch w/ a router b. subnet the new networks
Source and Destination Ports

49. What is the purpose of the TCP/IP Network Application Layer?
Network portion
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Media Control
Network Access

50. 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. larger address space b. data types and classes of service c. authentication and encryption
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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
They must wait until the first hosts finish transfering the media.