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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?
Identify processes or services that are communicating with end devices.
0 to 1023
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer Packet

2. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
SSH
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

3. 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?
8
Physical
DNS
UTP

4. 2 characteristics of peer-2-peer
IP is not properly installed
A. decentralized resources b. resource sharing w/o a dedicated server
Signal loss can be experienced.
Twisting of the cables

5. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. DB 60 b. Winchester 15-pin c. smart serial
Switch
Destination Network Address
Twisting of the cables

6. 3 statements about the role of routers in the network
A. MTA b. SMTP
Source and Destination IP address
TCP initializes the sequence numbers for the sessions.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

7. statements of IP adressing
OTDR
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
Console interface
A. next-hop b. metric/interface c. destination network address

8. What layer encapsulates segments into packets?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network Layer
A. low overhead b. connectionless

9. What type of routing uses information that is manually entered into the routing table?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Static
Physical

10. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
2046
A. Cat5 UTP b. Cat6 UTP
80 (HTTP)

11. When a network service fails - which port is most often used to access a router for management purposes?
Console
To facilitate the entry and exit of data on media.
When connecting a host to a switch.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

12. When a device is moved from one network to the other...?
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
Signal loss can be experienced.
Network Access
UTP

13. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
To prevent the receiver from being overwhelmed by incoming data.
Wireless
Next-Hop Address
Hub

14. Which portion of the network layer address does a router use to forward packets?
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
2046
Network portion
Host A

15. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Create signals that represent the bits in each frame for the media.
Rollover cable
Hosts return to listen-before-transmit mode.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

16. Which 2 options represent Layer 4 addressing?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. non-deterministic b. less overhead c. collisions exist
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The MAC protocol can be very simple.

17. What info is found in the TCP and UDP header info?
UTP
A. next-hop b. metric/interface c. destination network address
Source and Destination Ports
SSH

18. What do end devices do?
A. router b. firewall
Originate data flow.
Network Layer Packet
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

19. Statements that describe LAN
As the commands are entered.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
No collisions will occur on this link.
A backbone cable.

20. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
Source Port
Supports error detection.
A. minimizing of collisions b. division into broadcast domains
A. Physical b. Data Link

21. 2 features that make switches preferable to hubs
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. it has centralized administration b. security is easier to enforce
A. minimizing of collisions b. division into broadcast domains
Wireless

22. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
The destination host address.
Destination Network Address
Source Port

23. 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. show startup-config b. show running-config
Resolve IPv4 addresses to MAC addresses.
MAC
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

24. What are 2 commands used to view a host routing table?
A. netstat -r b. route PRINT
Any device whose backoff timer expires first.
A. HTTP b. HTTPS
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

25. In a connectionless system - What is correct?
A. MTA b. SMTP
Destination is not contacted before a packet is sent.
SSH
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

26. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The destination host address.
SMB

27. 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?
The address of the router that the host will use to 'get to the other side'.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
They must wait until the first hosts finish transfering the media.

28. 3 facts about the network portion of an IPv4 address
32 bits
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Static
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

29. What is an effect of improperly applying a network cable connector?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
DNS
Signal loss can be experienced.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

30. What command can be used to determine if the router has experienced any input or output errors?
Resolve IPv4 addresses to MAC addresses.
DNS
Show Interfaces
No collisions will occur on this link.

31. What are 3 properties of contention-based media access for a shared media?
To facilitate the entry and exit of data on media.
A. non-deterministic b. less overhead c. collisions exist
Network Layer Packet
Create signals that represent the bits in each frame for the media.

32. Group of hosts that have identical bit patterns in the high order bits of their addresses
Hosts return to listen-before-transmit mode.
255.255.255.0
To enable a receiving host to forward the data to the appropriate application.
Network

33. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Window Size
Identify processes or services that are communicating with end devices.
A. media sharing b. logical topology

34. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A. minimizing of collisions b. division into broadcast domains
Switch
80 (HTTP)

35. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
A. goodput b. throughput c. bandwidth
A. replace a switch w/ a router b. subnet the new networks
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

36. What are 3 common problems w/ large networks?
Logical Link Control sublayer
A physical topology.
A. perform degradation b. security issues c. host identification
Static

37. What is the function of the DLL?
It provides for the exchange of data over a common local media.
Network Layer Packet
To facilitate the entry and exit of data on media.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

38. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. larger address space b. data types and classes of service c. authentication and encryption
Physical
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Router(config)# interface FastEthernet 0/1

39. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Network address
Any device whose backoff timer expires first.
Switch

40. When destination network is not in the routing table - What are 2 actions the router might take?
IP Protocol
Fiber
Source and Destination IP address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

41. There are too many broadcasts on switches - what can be done?
It has expanded adressing capabilities.
A. larger address space b. data types and classes of service c. authentication and encryption
A. replace a switch w/ a router b. subnet the new networks
It provides interface between applications on either end of the network.

42. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
It provides interface between applications on either end of the network.
A. flow control b. session establishment c. numbering and sequencing
IP Protocol
255.255.255.0

43. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Binary ANDing
UTP
Time-to-live (TTL)

44. Which characteristics describe fiber optic cable?
It has expanded adressing capabilities.
SMB
A. it has centralized administration b. security is easier to enforce
A. not affected by EMI of RFI b. most expensive type of LAN cabling

45. 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?
Host mobility
A random delay helps prevent the stations from experiencing another collision during transmission.
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

46. What is the primary purpose of Layer 4?
Ctrl + Shift + 6
Minimal delays in data delivery.
A. low overhead b. connectionless
Identify processes or services that are communicating with end devices.

47. 2 most commonly used media types in ethernet networks
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
A. copper UTP b. optical fiber
A. Physical b. Data Link

48. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. non-deterministic b. less overhead c. collisions exist
UTP
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

49. To make a console connection from a comp to a Cisco router - what cable should be used?
Console interface
Rollover 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
It provides for the exchange of data over a common local media.

50. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
255.255.255.0
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. copper UTP b. optical fiber