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 is the primary purpose of ARP?
0 to 1023
Resolve IPv4 addresses to MAC addresses.
The magnetic field around the adjacent pairs of wire.
IP Protocol

2. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
2046
SMB
Transport

3. When do changes take effect in a Cisco router?
As the commands are entered.
To facilitate the entry and exit of data on media.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Identify processes or services that are communicating with end devices.

4. What information is added during encapsulation at OSI Layer 3?
Supports error detection.
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
Source and Destination IP address
A. DB 60 b. Winchester 15-pin c. smart serial

5. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
A. perform degradation b. security issues c. host identification
Window Size
FTP

6. Default Gateway is incorrect on the host - What is the impact on the communications?
Host A
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

7. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Resolve IPv4 addresses to MAC addresses.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
UTP
Network Access

8. 3 characteristics of valid Ethernet Layer 2 addresses
The MAC protocol can be very simple.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Signal loss can be experienced.

9. What are 2 commands used to view a host routing table?
Is a layer of specific encapsulation.
A. application b. services
A. netstat -r b. route PRINT
To enable a receiving host to forward the data to the appropriate application.

10. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Collisions can decrease network performance.
A. application b. services
A. DB 60 b. Winchester 15-pin c. smart serial
It does not support encryption.

11. During encapsulation - what happens in the Data Link Layer?
DNS
A. low overhead b. connectionless
A. it has centralized administration b. security is easier to enforce
The physical address is added.

12. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
172.16.192.160
Rollover cable
A. perform degradation b. security issues c. host identification

13. When is a straight-through cable used in a network?
SMB
When connecting a host to a switch.
A. media sharing b. logical topology
As the commands are entered.

14. What is a protocol that provides connectionless network layer services?
IP Protocol
A. they initiate data exchanges b. they may upload data to servers
The address of the router that the host will use to 'get to the other side'.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

15. What type of network cable is used between a terminal and a console port?
Console
Rollover cable
It has expanded adressing capabilities.
Originate data flow.

16. Which type of cable is most often associated w/ fiber-optic cable?
As the commands are entered.
A backbone cable.
A random delay helps prevent the stations from experiencing another collision during transmission.
SMB

17. 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?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. show startup-config b. show running-config
Hub

18. What do you need to use for an initial configuration on a Cisco router?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Console interface
To enable a receiving host to forward the data to the appropriate application.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

19. When destination network is not in the routing table - What are 2 actions the router might take?
The magnetic field around the adjacent pairs of wire.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Application Layer
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

20. What is the purpose of resource records in DNS?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Is used by the server to resolve names.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

21. What 2 type of cables would most commonly be used for new runs?
A. application b. services
A. Cat5 UTP b. Cat6 UTP
Network Layer
They must wait until the first hosts finish transfering the media.

22. 3 statements about the role of routers in the network
A. minimizing of collisions b. division into broadcast domains
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
It uses lasers as the light source.
The MAC protocol can be very simple.

23. What application layer protocol is used to support file transfers between client and server?
IP is not properly installed
A. next-hop b. metric/interface c. destination network address
Hosts return to listen-before-transmit mode.
FTP

24. What is a characteristic of a single-mode fiber-optic cable?
Network
32 bits
Destination Network Address
It uses lasers as the light source.

25. What is the role of MTA in handling email?
Supports error detection.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

26. What are 3 properties of contention-based media access for a shared media?
Console
A. non-deterministic b. less overhead c. collisions exist
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
A. goodput b. throughput c. bandwidth

27. What is the purpose of a default gateway?
SMB
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Identify the device that allows local network computers to communicate w/ devices in other networks.
80 (HTTP)

28. 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?
2046
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Router(config)# interface FastEthernet 0/1

29. Intermediary devices used to implement security between networks
Identify the device that allows local network computers to communicate w/ devices in other networks.
80 (HTTP)
A. minimizing of collisions b. division into broadcast domains
A. router b. firewall

30. What kind of problems are caused by excessive broadcast traffic on network segments?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. it has centralized administration b. security is easier to enforce
Supports error detection.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

31. What is the primary reason for developing IPv6?
A. minimizing of collisions b. division into broadcast domains
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Physical
It has expanded adressing capabilities.

32. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
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
Switch
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

33. 3 factors that should be considered when implementing Layer 2 protocols
2046
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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Router(config)# interface FastEthernet 0/1

34. Why is flow control used for TCP data transfer?
A. enable mode b. priviledge executive mode
To prevent the receiver from being overwhelmed by incoming data.
TCP initializes the sequence numbers for the sessions.
It reduces unnecessary broadcasts.

35. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
IP is not properly installed
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network Access

36. statements of IP adressing
A backbone cable.
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. media sharing b. logical topology
OTDR

37. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. minimizing of collisions b. division into broadcast domains
Transport
Switch
A. enable mode b. priviledge executive mode

38. At which layers of the OSI model does ethernet operate?
A. purpose b. geographic location c. ownership
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. physical layer b. DLL layer
Resolve IPv4 addresses to MAC addresses.

39. What is a characteristic of a logical point-to-point topology?
The address of the router that the host will use to 'get to the other side'.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The MAC protocol can be very simple.
Is a layer of specific encapsulation.

40. 3 common problems w/ a large network
80 (HTTP)
A. performance degradation b. security issues c. host identification
Minimal delays in data delivery.
Collisions can decrease network performance.

41. After an ethernet collision - which device has priority to transmit data?
8
A. servers b. routers c. network printers
Network address
Any device whose backoff timer expires first.

42. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
DNS

43. What is a default gateway address?

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44. What is the purpose of the TCP/IP Network Application Layer?
A. copper UTP b. optical fiber
Network Media Control
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable

45. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Ctrl + Shift + 6
0 to 1023
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 mobility

46. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
The destination host address.
Fiber
A. application b. services
Window Size

47. 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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Switch
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

48. 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
Network Media Control
A. Cat5 UTP b. Cat6 UTP
Network portion
A. the router will discard the packet b. the router will send a time exceeded message to the source host

49. 2 characteristics of clients in data networks
A. low overhead b. connectionless
A. they initiate data exchanges b. they may upload data to servers
Host mobility
Application Layer

50. What are the advantages of using a client-server model?
Application Layer
A. it has centralized administration b. security is easier to enforce
A. purpose b. geographic location c. ownership
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long