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. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
FTP
0 to 1023
A. perform degradation b. security issues c. host identification
It has expanded adressing capabilities.

2. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. larger address space b. data types and classes of service c. authentication and encryption
Minimal delays in data delivery.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Destination Network Address

3. What command can be used to determine if the router has experienced any input or output errors?
A. minimizing of collisions b. division into broadcast domains
Show Interfaces
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. router b. firewall

4. Which type of cable is most often associated w/ fiber-optic cable?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The physical address is added.
A backbone cable.
Window Size

5. When a network service fails - which port is most often used to access a router for management purposes?
Physical
Console
To facilitate the entry and exit of data on media.
A. Cat5 UTP b. Cat6 UTP

6. What is a drawback of the CSMA/CD access method?
Supports error detection.
Ctrl + Shift + 6
Collisions can decrease network performance.
A. perform degradation b. security issues c. host identification

7. 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
Originate data flow.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
UTP

8. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
DNS
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. show startup-config b. show running-config
A. servers b. routers c. network printers

9. There are too many broadcasts on switches - what can be done?
Fiber
A. netstat -r b. route PRINT
A. replace a switch w/ a router b. subnet the new networks
32 bits

10. What is a characteristic of a single-mode fiber-optic cable?
FTP
It uses lasers as the light source.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
DNS

11. What is the primary purpose of ARP?
MAC
A. larger address space b. data types and classes of service c. authentication and encryption
Router(config)# interface FastEthernet 0/1
Resolve IPv4 addresses to MAC addresses.

12. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
80 (HTTP)
The physical address is added.
A. minimizing of collisions b. division into broadcast domains

13. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Flash
Binary ANDing
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

14. Why is flow control used for TCP data transfer?
0 to 1023
A. HTTP b. HTTPS
A. Physical b. Data Link
To prevent the receiver from being overwhelmed by incoming data.

15. Group of hosts that have identical bit patterns in the high order bits of their addresses
OTDR
Hosts return to listen-before-transmit mode.
Network
A. minimizing of collisions b. division into broadcast domains

16. What are 2 email components used to forward mail between servers?
A. purpose b. geographic location c. ownership
A. it has centralized administration b. security is easier to enforce
Network Layer Packet
A. MTA b. SMTP

17. What is the proper order of the OSI Layers?
A. purpose b. geographic location c. ownership
A. addressing b. error detection c. frame delimiting
A. show startup-config b. show running-config
A. application b. presentation c. session d. transmision e. network f. data link g. physical

18. What layer encapsulates segments into packets?
A backbone cable.
Network
Network Layer
A. minimizing of collisions b. division into broadcast domains

19. 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. servers b. routers c. network printers
It provides interface between applications on either end of the network.
Show Interfaces

20. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It provides interface between applications on either end of the network.
To prevent the receiver from being overwhelmed by incoming data.
Hosts return to listen-before-transmit mode.

21. Which characteristics describe fiber optic cable?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Transport
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

22. Where is the IOS file stored at?
Flash
A. physical layer b. DLL layer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

23. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
Hub
A. low overhead b. connectionless
Router

24. What type of routing uses information that is manually entered into the routing table?
A. application b. services
Static
A. replace a switch w/ a router b. subnet the new networks
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

25. What information is added during encapsulation at OSI Layer 3?
Originate data flow.
Source and Destination IP address
Show Interfaces
A. flow control b. session establishment c. numbering and sequencing

26. 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. application b. presentation c. session d. transmision e. network f. data link g. physical
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Twisting of the cables
Resolve IPv4 addresses to MAC addresses.

27. Why are port numbers included in the TCP header of a segment?
A. low overhead b. connectionless
To prevent the receiver from being overwhelmed by incoming data.
As the commands are entered.
To enable a receiving host to forward the data to the appropriate application.

28. What do you need to use for an initial configuration on a Cisco router?
Host mobility
Originate data flow.
Console interface
It uses support from the lower layers to distinguish between connections to the service.

29. What are 3 common problems w/ large networks?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Source and Destination Ports
A. perform degradation b. security issues c. host identification
A. show startup-config b. show running-config

30. What type of network cable is used between a terminal and a console port?
Rollover cable
A. addressing b. error detection c. frame delimiting
Twisting of the cables
UDP

31. 2 features that make switches preferable to hubs
A physical topology.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. minimizing of collisions b. division into broadcast domains
Binary ANDing

32. What is a protocol that provides connectionless network layer services?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
IP Protocol
A. hot keys b. context-sensitive c. command syntax check
Physical

33. What are 2 forms of application layer software?
A. netstat -r b. route PRINT
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. application b. services

34. After an ethernet collision - which device has priority to transmit data?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Any device whose backoff timer expires first.
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
Host A

35. To make a console connection from a comp to a Cisco router - what cable should be used?
Time-to-live (TTL)
The destination host address.
8
Rollover cable

36. 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.
Network Access
A. router b. firewall
Twisting of the cables

37. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
Network Layer
A. performance degradation b. security issues c. host identification
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

38. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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. HTTP b. HTTPS
Fiber

39. At which layer of the TCP/IP model does ethernet operate?
Show Interfaces
MAC
Network Access
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

40. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Hosts return to listen-before-transmit mode.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. DB 60 b. Winchester 15-pin c. smart serial
IP Protocol

41. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
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
OTDR

42. What correctly describes a MAC address?
Destination Network Address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To enable a receiving host to forward the data to the appropriate application.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

43. What is the purpose of a default gateway?
Wireless
A. DB 60 b. Winchester 15-pin c. smart serial
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. perform degradation b. security issues c. host identification

44. 3 characteristics of valid Ethernet Layer 2 addresses
Source Port
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Rollover cable

45. 3 common problems w/ a large network
Destination is not contacted before a packet is sent.
They must wait until the first hosts finish transfering the media.
A. performance degradation b. security issues c. host identification
A. MTA b. SMTP

46. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Network Access
Network Layer Packet
0 to 1023
Switch

47. An admin needs to keep contents private - which access method should he use?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. addressing b. error detection c. frame delimiting
SSH
Host mobility

48. In business LANs - which connector is used w/ twisted-pair networking cable?
Twisting of the cables
A. Cat5 UTP b. Cat6 UTP
Network Layer
RJ-45

49. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
RJ-45
172.16.192.160
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

50. If you have a small network w/ 3 computers...
A. flow control b. session establishment c. numbering and sequencing
Network address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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