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 2 type of cables would most commonly be used for new runs?
Source and Destination Ports
Application Layer
A. Cat5 UTP b. Cat6 UTP
SSH

2. What determines the method of media access control?
A. media sharing b. logical topology
2046
IP Protocol
Destination Network Address

3. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
80 (HTTP)
It provides interface between applications on either end of the network.
A. servers b. routers c. network printers

4. 3 characteristics of valid Ethernet Layer 2 addresses
UDP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

5. What is the primary reason for developing IPv6?
DNS
A. next-hop b. metric/interface c. destination network address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It has expanded adressing capabilities.

6. Network Protocols
A. purpose b. geographic location c. ownership
Window Size
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Binary ANDing

7. What event occurs during the 3-way handshake?
A. DNS b. SMTP c. POP
A. Cat5 UTP b. Cat6 UTP
TCP initializes the sequence numbers for the sessions.
A. replace a switch w/ a router b. subnet the new networks

8. 3 functions of the upper data link sublayer in the OSI model
Source and Destination IP address
It provides for the exchange of data over a common local media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Collisions can decrease network performance.

9. What is a characteristic of a single-mode fiber-optic cable?
A. HTTP b. HTTPS
Destination is not contacted before a packet is sent.
255.255.255.224
It uses lasers as the light source.

10. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. Physical b. Data Link
Collisions can decrease network performance.
Destination Network Address
Window Size

11. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Console
A random delay helps prevent the stations from experiencing another collision during transmission.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
To facilitate the entry and exit of data on media.

12. What is the primary purpose of ARP?
Create signals that represent the bits in each frame for the media.
Resolve IPv4 addresses to MAC addresses.
A. DNS b. SMTP c. POP
Source and Destination IP address

13. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Router(config)# interface FastEthernet 0/1
Wireless
IP is not properly installed

14. What type of routing uses information that is manually entered into the routing table?
Physical
Minimal delays in data delivery.
OTDR
Static

15. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. physical layer b. DLL layer
It reduces unnecessary broadcasts.
A random delay helps prevent the stations from experiencing another collision during transmission.
255.255.255.0

16. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Destination is not contacted before a packet is sent.
SMB
A. copper UTP b. optical fiber
Hub

17. At which layer of the TCP/IP model does ethernet operate?
Window Size
Resolve IPv4 addresses to MAC addresses.
Network Access
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

18. What command can be used to determine if the router has experienced any input or output errors?
Logical Link Control sublayer
A. DNS b. SMTP c. POP
Show Interfaces
Physical

19. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. servers b. routers c. network printers
A. show startup-config b. show running-config
Fiber
Source and Destination IP address

20. 3 statements about routes and their use
Router
A. perform degradation b. security issues c. host identification
Hosts return to listen-before-transmit mode.
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

21. 3 factors that should be considered when implementing Layer 2 protocols
It does not support encryption.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The destination host address.
TCP initializes the sequence numbers for the sessions.

22. What is an automated service that matches resource names w/ required IP addresses?
A. Cat5 UTP b. Cat6 UTP
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
DNS

23. What are 3 common problems w/ large networks?
A. copper UTP b. optical fiber
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. goodput b. throughput c. bandwidth
A. perform degradation b. security issues c. host identification

24. What is a disadvantage of Telnet?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
IP Protocol
255.255.255.224
It does not support encryption.

25. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
DNS
Network address
Hosts return to listen-before-transmit mode.
The packets will be delivered and reassembled at destination.

26. There are too many broadcasts on switches - what can be done?
Console interface
A. Physical b. Data Link
To enable a receiving host to forward the data to the appropriate application.
A. replace a switch w/ a router b. subnet the new networks

27. What is PDU?
Network Media Control
To enable a receiving host to forward the data to the appropriate application.
Is a layer of specific encapsulation.
Identify processes or services that are communicating with end devices.

28. What can be a problem that is reduced by adding end-to-end addressing?
Originate data flow.
It reduces unnecessary broadcasts.
As the commands are entered.
Network Layer Packet

29. 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
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
Router(config)# hostname Costas
Twisting of the cables

30. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
Resolve IPv4 addresses to MAC addresses.
IP Protocol
UTP
2046

31. What device can check for faults - integrity and performance of media?
Transport
OTDR
SSH
The physical address is added.

32. An admin needs to keep contents private - which access method should he use?
SSH
The MAC protocol can be very simple.
To facilitate the entry and exit of data on media.
Physical

33. Where is the IOS file stored at?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Flash
Resolve IPv4 addresses to MAC addresses.
No collisions will occur on this link.

34. What is an effect of improperly applying a network cable connector?
A. DB 60 b. Winchester 15-pin c. smart serial
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Signal loss can be experienced.
A. purpose b. geographic location c. ownership

35. What is the function of the DLL?
UTP
A. HTTP b. HTTPS
It provides for the exchange of data over a common local media.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

36. 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?
Network
They must wait until the first hosts finish transfering the media.
A. DB 60 b. Winchester 15-pin c. smart serial
A. performance degradation b. security issues c. host identification

37. What do end devices do?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Source Port
Originate data flow.
A. they initiate data exchanges b. they may upload data to servers

38. 3 statements of media acess control
Any device whose backoff timer expires first.
Console
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. it has centralized administration b. security is easier to enforce

39. Group of hosts that have identical bit patterns in the high order bits of their addresses
172.16.192.160
A. decentralized resources b. resource sharing w/o a dedicated server
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Network

40. When destination network is not in the routing table - What are 2 actions the router might take?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It uses lasers as the light source.
Logical Link Control sublayer

41. At which layers of the OSI model does ethernet operate?
The MAC protocol can be very simple.
80 (HTTP)
Hub
A. physical layer b. DLL layer

42. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
MAC
It reduces unnecessary broadcasts.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network Layer Packet

43. 2 characteristics of peer-2-peer
IP is not properly installed
A. decentralized resources b. resource sharing w/o a dedicated server
Router(config)# hostname Costas
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

44. 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
Console interface
Destination is not contacted before a packet is sent.
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

45. What do you need to use for an initial configuration on a Cisco router?
Console interface
Originate data flow.
Is used by the server to resolve names.
A. copper UTP b. optical fiber

46. 2 functions of encapsulation
Hub
They must wait until the first hosts finish transfering the media.
A. purpose b. geographic location c. ownership
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

47. What is the purpose of a default gateway?
Router
A. purpose b. geographic location c. ownership
Originate data flow.
Identify the device that allows local network computers to communicate w/ devices in other networks.

48. When a network service fails - which port is most often used to access a router for management purposes?
Console
Any device whose backoff timer expires first.
Transport
Identify the device that allows local network computers to communicate w/ devices in other networks.

49. What can get you to an outside network?
A. media sharing b. logical topology
A default gateway (router).
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
No collisions will occur on this link.

50. 3 measures of data transfer
Network
A. goodput b. throughput c. bandwidth
To prevent the receiver from being overwhelmed by incoming data.
The magnetic field around the adjacent pairs of wire.