Test your basic knowledge |

CCNA Hard

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. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Telnet and FTP
Source Port - Acknowledgment Number - and Window
Physical Layer and Datalink Layer
A broadcast address will never be the source address of a frame

2. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Fiber optic cable.
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
To prevent switching loops in networks with redundant switched paths.
A cross-over cable

3. Which of the protocols below use TCP at the transport layer?
Encapsulations PPP and authentication CHAP
A broadcast address will never be the source address of a frame
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.

4. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
SMTP FTP and HTTP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

5. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
Learning - Listening - and Forwarding
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Serial0/1 is down - line protocol is down

6. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
Show arp and Show interface
All switch and bridge ports are in either the forwarding or blocking state.
100 meters
Switches - Bridges - and Routers

7. Which of the following are true of Ethernet technology?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Hosts use a logical bus topology
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Auto - On - and Desirable

8. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
Configure the switch so that it has a lower priority than other switches in the network.
Telnet and FTP
Layer 3
Encapsulations PPP and authentication CHAP

9. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
To prevent switching loops in networks with redundant switched paths.
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Duplex mismatch

10. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
Duplex mismatch
It operates without collisions and It provides faster data transfer
SMTP FTP and HTTP

11. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
SMTP - FTP - HTTP - and HTTPS
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information

12. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Network
TCP
Packet switching - Packet filtering and Internetwork communication.

13. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
SMTP - FTP - HTTP - and HTTPS
Layer 4
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Learning - Listening - and Forwarding

14. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
It is the sum of the costs based on bandwidth
Increased latency and Filtering of all frame errors
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology

15. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
An electrical pulse indicates that the collision has cleared.
To allow remote management of the switch.
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
Fiber optic cable.

16. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
It is used to prevent switching loops in networks with redundant switched routes.
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority

17. Which protocol uses TCP port 443 at layer 4?
HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
The switch will forward the frame to a specific port

18. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
The Bridgeg ID and The bridge priority
Sequence number - Window size - and Acknowledgment number
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
VLAN and Swtich

19. What is the IEEE standard associated with Gigabit Ethernet?
Decrease the window size.
802.3ab and 802.3z
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
The Bridgeg ID and The bridge priority

20. Which of the following can lead to the contribution of LAN traffic congestion?
In an improperly implemented redundant topology
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
VTP

21. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Port security
All switch and bridge ports are in either the forwarding or blocking state.
It will prevent segment 1's broadcasts from getting to segment 2.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

22. Which fields are included in the TCP header?
Duplex mismatch
100 meters
Source Port - Acknowledgment Number - and Window
Packet switching - Packet filtering and Internetwork communication.

23. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
A cross-over cable
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
To allow remote management of the switch.

24. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Information about a route should never be sent back in the direction from which the original update came.
Device Identifiers - Capabilities list - Platform
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
802.1Q and ISL

25. Which of the following services use TCP?
Layer 4
Auto - On - and Desirable
SMTP FTP and HTTP
The Bridgeg ID and The bridge priority

26. Which three of the protocols below belong to the application layer? (Select three answer choices)
Sequence number - Window size - and Acknowledgment number
HTTPS - SMTP - and TFTP
Data link
Auto - Desirable - and On

27. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
HTTPS
VTP
A hub and A repeater.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

28. Which of the following correctly describe steps in the OSI date encapsulation process?
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
Data link
An additional broadcast domain will be created.
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting

29. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
The interfaces must be configured for NAT.
VTP
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

30. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
Source Port - Acknowledgment Number - and Window
Congestion avoidance - Windowing and Buffering
ARP and ICMP
SMTP - FTP - HTTP - and HTTPS

31. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
Data link
Hosts use a logical bus topology
Source Port - Acknowledgment Number - and Window
It is used to prevent switching loops in networks with redundant switched routes.

32. With regard to Ethernet media access methods - which of the following are true?
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

33. By default - which of the following factors determines the spanning-tree path cost?
Transport
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Telnet and FTP
It is the sum of the costs based on bandwidth

34. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
VTP
Switches increase the number of collision domains in the network.
To allow remote management of the switch.
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

35. Which of the following correctly describe the various functions and virtues of a router?
A broadcast address will never be the source address of a frame
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
Packet switching - Packet filtering and Internetwork communication.

36. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Physical Layer and Datalink Layer
Hosts use a logical bus topology
A cross-over cable
VTP will allow switches to share VLAN configuration information

37. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Increased latency and Filtering of all frame errors
Packet switching - Packet filtering and Internetwork communication.
Path selections and Packet switching.
STP

38. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
In an improperly implemented redundant topology
Physical Layer and Datalink Layer
The interfaces must be configured for NAT.
Application

39. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Congestion avoidance - Windowing and Buffering
A cross-over cable
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has lower priority than other switches in the network

40. Which of the following are spanning tree port states?
Data link
The network layer
Learning - Listening - and Forwarding
Congestion avoidance - Windowing and Buffering

41. CDP is running between two CK devices. What information is supplied by CDP?
Buffering - Cut-through - and Congestion avoidance
An additional broadcast domain will be created.
Show arp and Show interface
Device Identifiers - Capabilities list - Platform

42. What is the purpose of the spanning-tree algorithm in a switched LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Duplex mismatch
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
To prevent switching loops in networks with redundant switched paths.

43. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Auto - On - and Desirable
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
ARP and ICMP

44. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
Network
Auto - On - and Desirable
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting

45. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Application
All switch and bridge ports are in either the forwarding or blocking state.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
STP

46. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
Physical Layer and Datalink Layer
Certkiller B > trace
An electrical pulse indicates that the collision has cleared.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.

47. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Buffering - Cut-through - and Congestion avoidance
Layer 3
Switches - Bridges - and Routers
Network

48. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
Configure the switch so that it has lower priority than other switches in the network
It operates without collisions and It provides faster data transfer

49. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
Packet switching - Packet filtering and Internetwork communication.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.

50. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Port security
In an improperly implemented redundant topology
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
802.3ab and 802.3z