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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. 3 measures of data transfer
Hub
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. goodput b. throughput c. bandwidth
A. performance degradation b. security issues c. host identification

2. If you have a full-duplex operational network - what can happen?
Logical Link Control sublayer
No collisions will occur on this link.
It reduces unnecessary broadcasts.
A. low overhead b. connectionless

3. 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?
Show Interfaces
2046
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. Cat5 UTP b. Cat6 UTP

4. What is a characteristic of a logical point-to-point topology?
Wireless
The MAC protocol can be very simple.
Minimal delays in data delivery.
The physical address is added.

5. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Static
A random delay helps prevent the stations from experiencing another collision during transmission.
DNS
255.255.255.0

6. 3 statements about the role of routers in the network
When connecting a host to a switch.
Supports error detection.
OTDR
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

7. What is an automated service that matches resource names w/ required IP addresses?
SMB
A. low overhead b. connectionless
A. performance degradation b. security issues c. host identification
DNS

8. 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?
255.255.255.224
A. identifies the communicating applications b. identifies multiple conversations between the hosts
They must wait until the first hosts finish transfering the media.
Source and Destination Ports

9. 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?
UDP
A. purpose b. geographic location c. ownership
8
SSH

10. What type of network cable is used between a terminal and a console port?
A. decentralized resources b. resource sharing w/o a dedicated server
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Rollover cable
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

11. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
SMB
A. non-deterministic b. less overhead c. collisions exist
Source and Destination IP address

12. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Destination is not contacted before a packet is sent.
Network address
A physical topology.
A. perform degradation b. security issues c. host identification

13. What is the primary purpose of Layer 4?
Ctrl + Shift + 6
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Identify processes or services that are communicating with end devices.
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

14. At which layer of the TCP/IP model does ethernet operate?
A. DB 60 b. Winchester 15-pin c. smart serial
A default gateway (router).
Network Access
32 bits

15. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
0 to 1023
Window Size
A. Cat5 UTP b. Cat6 UTP
A. Physical b. Data Link

16. Why is flow control used for TCP data transfer?
The MAC protocol can be very simple.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To prevent the receiver from being overwhelmed by incoming data.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

17. In business LANs - which connector is used w/ twisted-pair networking cable?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
RJ-45
A. copper UTP b. optical fiber
DNS

18. Which characteristics describe fiber optic cable?
80 (HTTP)
255.255.255.224
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. identifies the communicating applications b. identifies multiple conversations between the hosts

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

20. What do end devices do?
Originate data flow.
MAC
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

21. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Supports error detection.
Console
Flash

22. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. show startup-config b. show running-config
Hosts return to listen-before-transmit mode.
A. next-hop b. metric/interface c. destination network address
A. minimizing of collisions b. division into broadcast domains

23. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A default gateway (router).
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

24. 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
Hosts return to listen-before-transmit mode.
A. show startup-config b. show running-config
A. purpose b. geographic location c. ownership

25. What can get you to an outside network?
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 default gateway (router).
A. Physical b. Data Link
32 bits

26. 2 characteristics of clients in data networks
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. they initiate data exchanges b. they may upload data to servers
It has expanded adressing capabilities.
Switch

27. Which portion of the network layer address does a router use to forward packets?
Network portion
Network address
It provides for the exchange of data over a common local media.
A. Physical b. Data Link

28. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Transport
Network address
SSH

29. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. performance degradation b. security issues c. host identification
Hosts return to listen-before-transmit mode.
To prevent the receiver from being overwhelmed by incoming data.

30. 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. replace a switch w/ a router b. subnet the new networks
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Network address

31. What command can be used to determine if the router has experienced any input or output errors?
A. Cat5 UTP b. Cat6 UTP
Show Interfaces
A. media sharing b. logical topology
172.16.192.160

32. 2 features that make switches preferable to hubs
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. enable mode b. priviledge executive mode
A. perform degradation b. security issues c. host identification
A. minimizing of collisions b. division into broadcast domains

33. statements of IP adressing
Rollover cable
A. larger address space b. data types and classes of service c. authentication and encryption
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.

34. What is the purpose of resource records in DNS?
Resolve IPv4 addresses to MAC addresses.
A. hot keys b. context-sensitive c. command syntax check
Source Port
Is used by the server to resolve names.

35. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
172.16.192.160
Router(config)# hostname Costas

36. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
The packets will be delivered and reassembled at destination.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Create signals that represent the bits in each frame for the media.
Hub

37. What is the role of the OSI Application Layer?
IP Protocol
RJ-45
It provides interface between applications on either end of the network.
A. HTTP b. HTTPS

38. What is the primary rope of the physical layer in transmitting data?
255.255.255.0
The destination host address.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Create signals that represent the bits in each frame for the media.

39. 3 facts about the network portion of an IPv4 address
TCP initializes the sequence numbers for the sessions.
Host mobility
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

40. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A random delay helps prevent the stations from experiencing another collision during transmission.
RJ-45
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
Fiber

41. What is the proper order of the OSI Layers?
80 (HTTP)
A. physical layer b. DLL layer
A. application b. presentation c. session d. transmision e. network f. data link g. physical
MAC

42. Default Gateway is incorrect on the host - What is the impact on the communications?
A. MTA b. SMTP
It has expanded adressing capabilities.
Signal loss can be experienced.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

43. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
OTDR
A. the router will discard the packet b. the router will send a time exceeded message to the source host
IP is not properly installed
As the commands are entered.

44. What statements describe the logical token-passing topology?
To enable a receiving host to forward the data to the appropriate application.
The magnetic field around the adjacent pairs of wire.
Router(config)# hostname Costas
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

45. What is PDU?
Is a layer of specific encapsulation.
A default gateway (router).
Wireless
A. low overhead b. connectionless

46. 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?
Time-to-live (TTL)
IP is not properly installed
A. application b. services
A. show startup-config b. show running-config

47. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Console
Application Layer
Network

48. 2 functions of encapsulation
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 Layer Packet
A backbone cable.
A. DB 60 b. Winchester 15-pin c. smart serial

49. Where is the IOS file stored at?
SSH
Flash
Time-to-live (TTL)
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

50. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
UDP
MAC
IP is not properly installed