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. 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?
IP Protocol
OTDR
8
Application Layer

2. 2 characteristics of clients in data networks
It provides interface between applications on either end of the network.
A. they initiate data exchanges b. they may upload data to servers
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Show Interfaces

3. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
Console interface
A default gateway (router).
As the commands are entered.

4. If you have a full-duplex operational network - what can happen?
Fiber
No collisions will occur on this link.
FTP
A. identifies the communicating applications b. identifies multiple conversations between the hosts

5. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Access
32 bits
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

6. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. MTA b. SMTP
Transport
MAC

7. 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. next-hop b. metric/interface c. destination network address
A. Cat5 UTP b. Cat6 UTP
Host A
A. copper UTP b. optical fiber

8. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. replace a switch w/ a router b. subnet the new networks
It has expanded adressing capabilities.
TCP initializes the sequence numbers for the sessions.

9. 3 features that allow TCP to realibly and accurately track the transmission of data
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. flow control b. session establishment c. numbering and sequencing
Flash
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

10. 3 functions of the upper data link sublayer in the OSI model
The physical address is added.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

11. During a TCP session - if packets arrive out of order - what will happen?
Time-to-live (TTL)
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. physical layer b. DLL layer
The packets will be delivered and reassembled at destination.

12. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
172.16.192.160
DNS
The destination host address.

13. 3 measures of data transfer
A. router b. firewall
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. goodput b. throughput c. bandwidth

14. Important characteristic of UDP
Network
Rollover cable
Minimal delays in data delivery.
Host mobility

15. What makes fiber preferable to copper for interconnecting buildings?
A. DB 60 b. Winchester 15-pin c. smart serial
Network
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

16. What do the intermediary devices in the network do?
Network
Destination is not contacted before a packet is sent.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. Physical b. Data Link

17. 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
Network Access
8
Collisions can decrease network performance.

18. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Network Layer Packet
255.255.255.0
As the commands are entered.
OTDR

19. What correctly describes a MAC address?
Network portion
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
As the commands are entered.
It provides interface between applications on either end of the network.

20. Where is the IOS file stored at?
A. servers b. routers c. network printers
Flash
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. larger address space b. data types and classes of service c. authentication and encryption

21. Which characteristics describe fiber optic cable?
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. servers b. routers c. network printers
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

22. What is an automated service that matches resource names w/ required IP addresses?
RJ-45
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
DNS
Resolve IPv4 addresses to MAC addresses.

23. What are 3 pieces of info about a route contained in a routing table?
It does not support encryption.
IP Protocol
Fiber
A. next-hop b. metric/interface c. destination network address

24. 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. they initiate data exchanges b. they may upload data to servers
The destination host address.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Twisting of the cables

25. What application layer protocol is used to support file transfers between client and server?
TCP initializes the sequence numbers for the sessions.
No collisions will occur on this link.
FTP
Static

26. 3 primary functions of the data link layer encapsulation
A. Cat5 UTP b. Cat6 UTP
It uses lasers as the light source.
A. HTTP b. HTTPS
A. addressing b. error detection c. frame delimiting

27. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
The address of the router that the host will use to 'get to the other side'.
A. flow control b. session establishment c. numbering and sequencing
A. netstat -r b. route PRINT

28. After an ethernet collision - which device has priority to transmit data?
A. netstat -r b. route PRINT
A. next-hop b. metric/interface c. destination network address
Any device whose backoff timer expires first.
It has expanded adressing capabilities.

29. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Network Layer Packet
IP is not properly installed
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

30. What is the purpose of resource records in DNS?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. replace a switch w/ a router b. subnet the new networks
Rollover cable
Is used by the server to resolve names.

31. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
UDP
A. netstat -r b. route PRINT
Identify the device that allows local network computers to communicate w/ devices in other networks.

32. Why are port numbers included in the TCP header of a segment?
Minimal delays in data delivery.
Switch
To enable a receiving host to forward the data to the appropriate application.
8

33. During encapsulation - what happens in the Data Link Layer?
A. performance degradation b. security issues c. host identification
It provides interface between applications on either end of the network.
The physical address is added.
Source and Destination Ports

34. 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?
172.16.192.160
A. application b. services
Originate data flow.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

35. What do you need to use for an initial configuration on a Cisco router?
Console interface
A. performance degradation b. security issues c. host identification
Network
Network Access

36. What statements describe the logical token-passing topology?
Source Port
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
OTDR

37. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. media sharing b. logical topology
Window Size

38. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Collisions can decrease network performance.
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
The physical address is added.
Switch

39. What are 2 features of User Diagram Protocol (UDP)?
Console
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. low overhead b. connectionless
Ctrl + Shift + 6

40. What causes crosstalk within cable pairs when using UTP?
Ctrl + Shift + 6
The magnetic field around the adjacent pairs of wire.
Static
MAC

41. When do changes take effect in a Cisco router?
To prevent the receiver from being overwhelmed by incoming data.
As the commands are entered.
A. purpose b. geographic location c. ownership
IP is not properly installed

42. What is the role of the OSI Application Layer?
Static
It provides interface between applications on either end of the network.
The MAC protocol can be very simple.
Destination is not contacted before a packet is sent.

43. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
It does not support encryption.
Hub
A. non-deterministic b. less overhead c. collisions exist
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

44. When a device is moved from one network to the other...?
0 to 1023
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. DB 60 b. Winchester 15-pin c. smart serial
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

45. At which layers of the OSI model does ethernet operate?
To facilitate the entry and exit of data on media.
A. copper UTP b. optical fiber
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. physical layer b. DLL layer

46. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. Physical b. Data Link
A. low overhead b. connectionless
80 (HTTP)
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

47. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
Destination is not contacted before a packet is sent.
Console interface
Hub

48. At which layer of the TCP/IP model does ethernet operate?
The packets will be delivered and reassembled at destination.
A. perform degradation b. security issues c. host identification
Flash
Network Access

49. What event occurs during the 3-way handshake?
Host A
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. the router will discard the packet b. the router will send a time exceeded message to the source host
TCP initializes the sequence numbers for the sessions.

50. In a connectionless system - What is correct?
Supports error detection.
No collisions will occur on this link.
Destination is not contacted before a packet is sent.
A. HTTP b. HTTPS