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 the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
Application
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

2. CDP is running between two CK devices. What information is supplied by CDP?
Certkiller B > trace
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.
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.
Device Identifiers - Capabilities list - Platform

3. 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?
STP
The system is malfunctioning.
In an improperly implemented redundant topology
Layer 3

4. With regard to Ethernet media access methods - which of the following are true?
The port is experiencing errors
Encapsulations PPP and authentication CHAP
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.
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

5. Which fields are included in the TCP header?
Serial0/1 is down - line protocol is down
Data link
Buffering - Cut-through - and Congestion avoidance
Source Port - Acknowledgment Number - and Window

6. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show cdp neighbor detail
Information about a route should never be sent back in the direction from which the original update came.

7. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Network
Sequence number - Window size - and Acknowledgment number
A cross-over cable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

8. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4
The interfaces must be configured for NAT.

9. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
The port is experiencing errors
The network layer
Learning - Listening - and Forwarding
Duplex mismatch

10. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Telnet and FTP
Auto - Desirable - and On
HTTPS
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

11. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
VLAN and Swtich
802.1Q and ISL
Show cdp neighbor detail
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.

12. 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?
The network layer
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Increased latency and Filtering of all frame errors
Congestion avoidance - Windowing and Buffering

13. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
Layer 4
Show arp and Show interface
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port

14. 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?
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
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

15. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The network layer
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.

16. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A hub and A repeater.
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private

17. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It operates without collisions and It provides faster data transfer
Decrease the window size.
An additional broadcast domain will be created.

18. 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.
VTP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.

19. 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?
Application
SMTP - FTP - HTTP - and HTTPS
Data link
An electrical pulse indicates that the collision has cleared.

20. In a switched LAN network - What is the Spanning-Tree algorithm used for?
ARP and ICMP
802.1Q and ISL
It is used to prevent switching loops in networks with redundant switched routes.
Physical Layer and Datalink Layer

21. 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?
Switches increase the number of collision domains in the network.
Port security
The Bridgeg ID and The bridge priority
The network layer

22. 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.
Configure the switch so that it has lower priority than other switches in the network
Switches - Bridges - and Routers
Fiber optic cable.

23. Which of the following services use TCP?
Decrease the window size.
Path selections and Packet switching.
Information about a route should never be sent back in the direction from which the original update came.
SMTP FTP and HTTP

24. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Physical Layer and Datalink Layer
In an improperly implemented redundant topology
A hub and A repeater.
VTP will allow switches to share VLAN configuration information

25. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Telnet and FTP
Configure the switch so that it has lower priority than other switches in the network
MAC Address and Bridge Priority
Serial0/1 is down - line protocol is down

26. Which protocol uses TCP port 443 at layer 4?
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Duplex mismatch
HTTPS

27. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Switches increase the number of collision domains in the network.
A hub and A repeater.
Sequence number - Window size - and Acknowledgment number

28. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Sequence number - Window size - and Acknowledgment number
VLAN and Swtich
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.

29. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
SMTP FTP and HTTP
Telnet and FTP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

30. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Port security
Application
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.
Decrease the window size.

31. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Encapsulations PPP and authentication CHAP
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 system is malfunctioning.
An additional broadcast domain will be created.

32. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
The interfaces must be configured for NAT.
Switches increase the number of collision domains in the network.
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.
The sequence number in the TCP header.

33. 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?
802.3ab and 802.3z
ARP and ICMP
Layer 3
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.

34. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Auto - On - and Desirable
Switches - Bridges - and Routers
Path selections and Packet switching.
Port security

35. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Sequence number - Window size - and Acknowledgment number
Layer 4
Decrease the window size.
Switches - Bridges - and Routers

36. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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37. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
802.1Q and ISL
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4

38. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Configure the switch so that it has a lower priority than other switches in the network.
Buffering - Cut-through - and Congestion avoidance
Port security
Source Port - Acknowledgment Number - and Window

39. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
Auto - Desirable - and On
VLAN and Swtich
Buffering - Cut-through - and Congestion avoidance
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

40. 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?
Sequence number - Window size - and Acknowledgment number
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.
The sequence number in the TCP header.
Telnet and FTP

41. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Source Port - Acknowledgment Number - and Window
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

42. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Show arp and Show interface
Auto - Desirable - and On

43. 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.
Port security
Layer 4
Device Identifiers - Capabilities list - Platform

44. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
Increased latency and Filtering of all frame errors
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Application

45. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The network layer
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

46. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Configure the switch so that it has a lower priority than other switches in the network.
Encapsulations PPP and authentication CHAP
Configure the switch so that it has lower priority than other switches in the network
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.

47. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
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.
Hosts use a logical bus topology
Device Identifiers - Capabilities list - Platform
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

48. 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?
Packet switching - Packet filtering and Internetwork communication.
In an improperly implemented redundant topology
802.1Q and ISL
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.

49. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
TCP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Auto - On - and Desirable
Data link

50. Which of the protocols below use TCP at the transport layer?
CertK Switch(config)# ip default-gateway 192.168.1.115
An electrical pulse indicates that the collision has cleared.
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.
SMTP - FTP - HTTP - and HTTPS