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. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
SMB
Is used by the server to resolve names.
Network address
A. DB 60 b. Winchester 15-pin c. smart serial

2. What application layer protocol is used to support file transfers between client and server?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
FTP
Destination Network Address
A. enable mode b. priviledge executive mode

3. At which layer of the TCP/IP model does ethernet operate?
Network Access
A physical topology.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
It provides interface between applications on either end of the network.

4. There are too many broadcasts on switches - what can be done?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. replace a switch w/ a router b. subnet the new networks
A. the router will discard the packet b. the router will send a time exceeded message to the source host
255.255.255.0

5. 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?
Switch
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
FTP
172.16.192.160

6. 3 characteristics of valid Ethernet Layer 2 addresses
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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
Physical
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

7. What are 3 common problems w/ large networks?
A. next-hop b. metric/interface c. destination network address
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
80 (HTTP)
A. perform degradation b. security issues c. host identification

8. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
It has expanded adressing capabilities.
Rollover cable
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Hosts return to listen-before-transmit mode.

9. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
32 bits
It does not support encryption.
Binary ANDing
SMB

10. What connectors are commonly associated w/ Cisco's V.35 serial cables?
Minimal delays in data delivery.
A. physical layer b. DLL layer
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. DB 60 b. Winchester 15-pin c. smart serial

11. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Is a layer of specific encapsulation.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

12. What info is found in the TCP and UDP header info?
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 uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Source and Destination Ports
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

13. What is a component of a routing table entry?
A. servers b. routers c. network printers
Next-Hop Address
Binary ANDing
Router(config)# interface FastEthernet 0/1

14. What device can check for faults - integrity and performance of media?
Host mobility
A. show startup-config b. show running-config
Router
OTDR

15. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A. purpose b. geographic location c. ownership
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A physical topology.

16. What is the purpose of resource records in DNS?
No collisions will occur on this link.
0 to 1023
Is used by the server to resolve names.
Router(config)# hostname Costas

17. What are 2 email components used to forward mail between servers?
It does not support encryption.
A. show startup-config b. show running-config
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. MTA b. SMTP

18. What characteristic of an UTP helps reduce interference?
Twisting of the cables
2046
Transport
Console interface

19. What is the primary purpose of ARP?
The address of the router that the host will use to 'get to the other side'.
It does not support encryption.
Resolve IPv4 addresses to MAC addresses.
Router(config)# hostname Costas

20. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Host A
The physical address is added.
UDP

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
The destination host address.
Network Layer
As the commands are entered.

22. How many bits make up an IPv4 address?
32 bits
255.255.255.224
2046
The MAC protocol can be very simple.

23. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Static
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It provides interface between applications on either end of the network.

24. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. MTA b. SMTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
0 to 1023
Time-to-live (TTL)

25. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
Source Port
A. not affected by EMI of RFI b. most expensive type of LAN cabling
SSH

26. Which layer supplies services and allows user interface?
A. application b. services
When connecting a host to a switch.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Application Layer

27. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
TCP initializes the sequence numbers for the sessions.
A backbone cable.
Supports error detection.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

28. 3 common problems w/ a large network
IP is not properly installed
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. performance degradation b. security issues c. host identification
A. DNS b. SMTP c. POP

29. What method of signal transmission uses radio waves to carry signals?
Wireless
Console
Network portion
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

30. 2 most commonly used media types in ethernet networks
RJ-45
A. copper UTP b. optical fiber
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
OTDR

31. Group of hosts that have identical bit patterns in the high order bits of their addresses
When connecting a host to a switch.
The physical address is added.
Network
It uses lasers as the light source.

32. 3 primary functions of the data link layer encapsulation
Network Layer
A. perform degradation b. security issues c. host identification
A. addressing b. error detection c. frame delimiting
The physical address is added.

33. What is a benefit of a WAN?
Originate data flow.
IP is not properly installed
When connecting a host to a switch.
Host mobility

34. 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. 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. next-hop b. metric/interface c. destination network address
A. non-deterministic b. less overhead c. collisions exist
A. the router will discard the packet b. the router will send a time exceeded message to the source host

35. 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 random delay helps prevent the stations from experiencing another collision during transmission.
Network
Create signals that represent the bits in each frame for the media.

36. What is the purpose of the preamble in an ethernet frame?
2046
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
They must wait until the first hosts finish transfering the media.
Resolve IPv4 addresses to MAC addresses.

37. 3 functions of the upper data link sublayer in the OSI model
Hub
A physical topology.
OTDR
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

38. Why are port numbers included in the TCP header of a segment?
A. Cat5 UTP b. Cat6 UTP
To enable a receiving host to forward the data to the appropriate application.
Rollover cable
Source and Destination Ports

39. What determines the method of media access control?
IP Protocol
A. media sharing b. logical topology
Flash
Collisions can decrease network performance.

40. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. Physical b. Data Link
Console interface
Rollover cable

41. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
Hosts return to listen-before-transmit mode.
Supports error detection.
Network portion

42. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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
172.16.192.160

43. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Show Interfaces
A. HTTP b. HTTPS
Source and Destination IP address

44. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
The packets will be delivered and reassembled at destination.
To facilitate the entry and exit of data on media.
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

45. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
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
Switch
MAC

46. 2 characteristics of clients in data networks
Wireless
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. they initiate data exchanges b. they may upload data to servers
Transport

47. 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?
80 (HTTP)
A. performance degradation b. security issues c. host identification
8
A. they initiate data exchanges b. they may upload data to servers

48. 2 characteristics of peer-2-peer
To enable a receiving host to forward the data to the appropriate application.
A. decentralized resources b. resource sharing w/o a dedicated server
Ctrl + Shift + 6
A. perform degradation b. security issues c. host identification

49. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
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. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
Logical Link Control sublayer
Network Layer Packet

50. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
0 to 1023
Network Layer