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 an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Network address
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Hub

2. Which type of cable is most often associated w/ fiber-optic cable?
Identify processes or services that are communicating with end devices.
A backbone cable.
A. router b. firewall
No collisions will occur on this link.

3. In a connectionless system - What is correct?
Console
A. goodput b. throughput c. bandwidth
Destination is not contacted before a packet is sent.
A. MTA b. SMTP

4. 3 features that allow TCP to realibly and accurately track the transmission of data
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
They must wait until the first hosts finish transfering the media.
Switch
A. flow control b. session establishment c. numbering and sequencing

5. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. they initiate data exchanges b. they may upload data to servers
Router(config)# hostname Costas

6. At which layer of the TCP/IP model does ethernet operate?
Host A
It does not support encryption.
Network Layer Packet
Network Access

7. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
No collisions will occur on this link.
0 to 1023
Any device whose backoff timer expires first.
A. minimizing of collisions b. division into broadcast domains

8. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The MAC protocol can be very simple.
255.255.255.0
The physical address is added.

9. What is the primary purpose of Layer 4?
32 bits
It uses lasers as the light source.
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
Identify processes or services that are communicating with end devices.

10. 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?
A physical topology.
2046
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
It provides interface between applications on either end of the network.

11. What characteristic of an UTP helps reduce interference?
Is used by the server to resolve names.
Twisting of the cables
172.16.192.160
Destination Network Address

12. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
A. low overhead b. connectionless
Source Port
A. DNS b. SMTP c. POP

13. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
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
The magnetic field around the adjacent pairs of wire.
Rollover cable
Network address

14. What are 3 properties of contention-based media access for a shared media?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Collisions can decrease network performance.
A. non-deterministic b. less overhead c. collisions exist
It uses lasers as the light source.

15. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
A. decentralized resources b. resource sharing w/o a dedicated server
TCP initializes the sequence numbers for the sessions.
Network Layer Packet

16. Statements that describe LAN
Network portion
The physical address is added.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
IP Protocol

17. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Network address
Hub
Identify the device that allows local network computers to communicate w/ devices in other networks.
Wireless

18. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A backbone cable.
SMB
A. copper UTP b. optical fiber
It uses support from the lower layers to distinguish between connections to the service.

19. 2 functions of encapsulation
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A physical topology.
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device

20. There are too many broadcasts on switches - what can be done?
172.16.192.160
A. replace a switch w/ a router b. subnet the new networks
UDP
Switch

21. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. Physical b. Data Link
A physical topology.

22. What are 2 protocols for transfering web resources?
Identify processes or services that are communicating with end devices.
A. HTTP b. HTTPS
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. next-hop b. metric/interface c. destination network address

23. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
255.255.255.224
To prevent the receiver from being overwhelmed by incoming data.
Window Size
Application Layer

24. 3 functions of the upper data link sublayer in the OSI model
A. physical layer b. DLL layer
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Network Layer Packet
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

25. What command can be used to determine if the router has experienced any input or output errors?
UTP
A. flow control b. session establishment c. numbering and sequencing
Any device whose backoff timer expires first.
Show Interfaces

26. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
It does not support encryption.
Minimal delays in data delivery.
Host mobility

27. If you have a full-duplex operational network - what can happen?
A. DB 60 b. Winchester 15-pin c. smart serial
No collisions will occur on this link.
SMB
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

28. What causes crosstalk within cable pairs when using UTP?
A. perform degradation b. security issues c. host identification
The magnetic field around the adjacent pairs of wire.
DNS
Network Media Control

29. What is a component of a routing table entry?
Next-Hop Address
A. MTA b. SMTP
SMB
A. physical layer b. DLL layer

30. Which portion of the network layer address does a router use to forward packets?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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
Network portion
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

31. 3 terms that define the forms of help available within the Cisco IOS
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. hot keys b. context-sensitive c. command syntax check
The packets will be delivered and reassembled at destination.
Router(config)# interface FastEthernet 0/1

32. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. application b. services
UDP
Host mobility
A. flow control b. session establishment c. numbering and sequencing

33. What do you need to use for an initial configuration on a Cisco router?
Console interface
The destination host address.
Originate data flow.
A. copper UTP b. optical fiber

34. 3 statements about the role of routers in the network
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. Cat5 UTP b. Cat6 UTP
A. DB 60 b. Winchester 15-pin c. smart serial

35. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
A. low overhead b. connectionless
Physical
The address of the router that the host will use to 'get to the other side'.

36. What networking devices are recommended to be assigned static IP addresses?
Source and Destination IP address
A. minimizing of collisions b. division into broadcast domains
A. low overhead b. connectionless
A. servers b. routers c. network printers

37. When a network service fails - which port is most often used to access a router for management purposes?
It provides for the exchange of data over a common local media.
A. Physical b. Data Link
Console
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

38. An admin needs to keep contents private - which access method should he use?
Host mobility
A. decentralized resources b. resource sharing w/o a dedicated server
A. router b. firewall
SSH

39. statements of IP adressing
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Source and Destination IP address
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
Collisions can decrease network performance.

40. What is a protocol that provides connectionless network layer services?
A. minimizing of collisions b. division into broadcast domains
Network Media Control
IP Protocol
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

41. Which 2 options represent Layer 4 addressing?
A. non-deterministic b. less overhead c. collisions exist
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. Cat5 UTP b. Cat6 UTP
A. physical layer b. DLL layer

42. What are the advantages of using a client-server model?
Window Size
Identify the device that allows local network computers to communicate w/ devices in other networks.
No collisions will occur on this link.
A. it has centralized administration b. security is easier to enforce

43. 2 most commonly used media types in ethernet networks
Any device whose backoff timer expires first.
A. copper UTP b. optical fiber
The physical address is added.
A. minimizing of collisions b. division into broadcast domains

44. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Switch
A default gateway (router).
Binary ANDing
Twisting of the cables

45. What is the purpose of the TCP/IP Network Application Layer?
Rollover cable
Transport
It provides for the exchange of data over a common local media.
Network Media Control

46. 2 characteristics of peer-2-peer
Logical Link Control sublayer
Transport
The address of the router that the host will use to 'get to the other side'.
A. decentralized resources b. resource sharing w/o a dedicated server

47. What is a benefit of a WAN?
The MAC protocol can be very simple.
A. it has centralized administration b. security is easier to enforce
Host mobility
UDP

48. 3 statements about routes and their use
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network portion
255.255.255.0

49. 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
A. performance degradation b. security issues c. host identification
Hub
It uses support from the lower layers to distinguish between connections to the service.

50. What is dinamically selected by the source host when forwarding data?
Host mobility
A. replace a switch w/ a router b. subnet the new networks
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
Source Port