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. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. DB 60 b. Winchester 15-pin c. smart serial
Network address
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

2. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Router(config)# interface FastEthernet 0/1
UDP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

3. What device can check for faults - integrity and performance of media?
OTDR
Rollover cable
A. perform degradation b. security issues c. host identification
They must wait until the first hosts finish transfering the media.

4. 3 properties of peer-2-peer applications
Physical
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
Wireless
A. Physical b. Data Link

5. What correctly describes a MAC address?
Destination Network Address
Any device whose backoff timer expires first.
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

6. What makes fiber preferable to copper for interconnecting buildings?
255.255.255.0
A. copper UTP b. optical fiber
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

7. Important characteristic of UDP
Minimal delays in data delivery.
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
2046
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

8. When a network service fails - which port is most often used to access a router for management purposes?
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
Destination Network Address
32 bits
Console

9. 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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host mobility
They must wait until the first hosts finish transfering the media.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

10. What is the purpose of a default gateway?
SSH
Destination is not contacted before a packet is sent.
Identify the device that allows local network computers to communicate w/ devices in other networks.
No collisions will occur on this link.

11. Which characteristics describe fiber optic cable?
RJ-45
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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

12. What do end devices do?
Source and Destination Ports
Network Layer Packet
Originate data flow.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

13. What information is added during encapsulation at OSI Layer 3?
It provides interface between applications on either end of the network.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Source and Destination IP address
No collisions will occur on this link.

14. Which 2 options represent Layer 4 addressing?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To prevent the receiver from being overwhelmed by incoming data.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. identifies the communicating applications b. identifies multiple conversations between the hosts

15. 3 statements of media acess control
It does not support encryption.
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
MAC
DNS

16. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Source and Destination Ports
Next-Hop Address
OTDR
SMB

17. When do changes take effect in a Cisco router?
As the commands are entered.
Host A
Console interface
A. it has centralized administration b. security is easier to enforce

18. What are 2 forms of application layer software?
A. application b. services
Next-Hop Address
A. larger address space b. data types and classes of service c. authentication and encryption
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

19. Which device is used to create or divide broadcast domains?
Router
A. physical layer b. DLL layer
The address of the router that the host will use to 'get to the other side'.
Identify processes or services that are communicating with end devices.

20. What command is used to change the default name to 'Costas'?
Show Interfaces
Router(config)# hostname Costas
When connecting a host to a switch.
Physical

21. What is a protocol that provides connectionless network layer services?
IP Protocol
TCP initializes the sequence numbers for the sessions.
Network Access
Network portion

22. What type of network cable is used between a terminal and a console port?
Rollover cable
The MAC protocol can be very simple.
Time-to-live (TTL)
Originate data flow.

23. What are 2 email components used to forward mail between servers?
Signal loss can be experienced.
Host A
A. MTA b. SMTP
Resolve IPv4 addresses to MAC addresses.

24. What is the purpose of the TCP/IP Network Application Layer?
Minimal delays in data delivery.
Console interface
A. application b. services
Network Media Control

25. What event occurs during the 3-way handshake?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
IP is not properly installed
TCP initializes the sequence numbers for the sessions.
Router(config)# interface FastEthernet 0/1

26. What can get you to an outside network?
Signal loss can be experienced.
The MAC protocol can be very simple.
A default gateway (router).
Destination is not contacted before a packet is sent.

27. During encapsulation - what happens in the Data Link Layer?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It provides interface between applications on either end of the network.
A. low overhead b. connectionless
The physical address is added.

28. Why are port numbers included in the TCP header of a segment?
A. netstat -r b. route PRINT
Time-to-live (TTL)
80 (HTTP)
To enable a receiving host to forward the data to the appropriate application.

29. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. physical layer b. DLL layer
A. purpose b. geographic location c. ownership
Any device whose backoff timer expires first.

30. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Supports error detection.
It uses support from the lower layers to distinguish between connections to the service.
Network Layer Packet
A. enable mode b. priviledge executive mode

31. 2 most commonly used media types in ethernet networks
A default gateway (router).
Collisions can decrease network performance.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. copper UTP b. optical fiber

32. What is the primary rope of the physical layer in transmitting data?
A. goodput b. throughput c. bandwidth
32 bits
Create signals that represent the bits in each frame for the media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

33. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

34. What do you need to use for an initial configuration on a Cisco router?
Host A
Router(config)# hostname Costas
Router
Console interface

35. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. Physical b. Data Link
A. DB 60 b. Winchester 15-pin c. smart serial
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. MTA b. SMTP

36. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
A. replace a switch w/ a router b. subnet the new networks
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A backbone cable.

37. What is the proper order of the OSI Layers?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
No collisions will occur on this link.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
The destination host address.

38. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Wireless
It provides for the exchange of data over a common local media.

39. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
A. HTTP b. HTTPS
A. servers b. routers c. network printers
Show Interfaces

40. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Hosts return to listen-before-transmit mode.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
80 (HTTP)

41. What are 3 properties of contention-based media access for a shared media?
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
255.255.255.224
Next-Hop Address
A. non-deterministic b. less overhead c. collisions exist

42. If you have a full-duplex operational network - what can happen?
It provides interface between applications on either end of the network.
SSH
No collisions will occur on this link.
A. router b. firewall

43. After an ethernet collision - which device has priority to transmit data?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
8
Any device whose backoff timer expires first.
A. low overhead b. connectionless

44. What are 3 pieces of info about a route contained in a routing table?
Network Media Control
Logical Link Control sublayer
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. next-hop b. metric/interface c. destination network address

45. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A. performance degradation b. security issues c. host identification
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Originate data flow.

46. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Any device whose backoff timer expires first.
A. non-deterministic b. less overhead c. collisions exist
The destination host address.

47. What is a component of a routing table entry?
Network
A. performance degradation b. security issues c. host identification
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Next-Hop Address

48. What are 2 commands used to view a host routing table?
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 topology.
A. netstat -r b. route PRINT
They must wait until the first hosts finish transfering the media.

49. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
Source and Destination Ports
It uses lasers as the light source.
Network

50. What is the primary purpose of ARP?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. flow control b. session establishment c. numbering and sequencing
Resolve IPv4 addresses to MAC addresses.
Collisions can decrease network performance.