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. 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?
Application
The switch will forward the frame to a specific port
Learning - Listening - and Forwarding
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

2. 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
Information about a route should never be sent back in the direction from which the original update came.
The network layer
Encapsulations PPP and authentication CHAP
The interfaces must be configured for NAT.

3. 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.
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
Decrease the window size.
It will prevent segment 1's broadcasts from getting to segment 2.

4. 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.
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.
Increased latency and Filtering of all frame errors
It is the sum of the costs based on bandwidth

5. 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?
An electrical pulse indicates that the collision has cleared.
Port security
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

6. 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?
100 meters
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
A hub and A repeater.

7. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
Configure the switch so that it has lower priority than other switches in the network
Information about a route should never be sent back in the direction from which the original update came.
The switch will forward the frame to a specific port
The port is experiencing errors

8. 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.
Port security
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
The sequence number in the TCP header.

9. With regard to Ethernet media access methods - which of the following are true?
Configure the switch so that it has lower priority than other switches in the network
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 network layer
HTTPS

10. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Switches increase the number of collision domains in the network.
Layer 4
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

11. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

12. Which of the following are types of flow control?
100 meters
Data link
To prevent switching loops in networks with redundant switched paths.
Buffering - Cut-through - and Congestion avoidance

13. 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?
A cross-over cable
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
Certkiller B > trace
Congestion avoidance - Windowing and Buffering

14. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
The switch will forward the frame to a specific port

15. 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?
Sequence number - Window size - and Acknowledgment number
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
Layer 3
Show arp and Show interface

16. 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
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.
All switch and bridge ports are in either the forwarding or blocking state.
Data link

17. 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?
Show arp and Show interface
SMTP - FTP - HTTP - and HTTPS
ARP and ICMP
To prevent switching loops in networks with redundant switched paths.

18. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
HTTPS
A cross-over cable
Switches increase the number of collision domains in the network.

19. 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?
Configure the switch so that it has lower priority than other switches in the network
802.3ab and 802.3z
Decrease the window size.
ARP and ICMP

20. 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
The system is malfunctioning.
MAC Address and Bridge Priority
Congestion avoidance - Windowing and Buffering
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

21. 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?
An additional broadcast domain will be created.
The interfaces must be configured for NAT.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
CertK Switch(config)# ip default-gateway 192.168.1.115

22. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
VTP will allow switches to share VLAN configuration information
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network
The system is malfunctioning.

23. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
This is an Ethernet port operating at half duplex
The network layer
The system is malfunctioning.

24. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
It will prevent segment 1's broadcasts from getting to segment 2.
In an improperly implemented redundant topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

25. 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
The interfaces must be configured for NAT.
HTTPS
Application

26. 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?
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.
Application
A hub and A repeater.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

27. 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?
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.
Show cdp neighbor detail
The system is malfunctioning.

28. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Telnet and FTP
Packet switching - Packet filtering and Internetwork communication.

29. Which protocol uses TCP port 443 at layer 4?
Device Identifiers - Capabilities list - Platform
The interfaces must be configured for NAT.
Decrease the window size.
HTTPS

30. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Transport
Duplex mismatch

31. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
It will prevent segment 1's broadcasts from getting to segment 2.
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 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.
802.3ab and 802.3z

32. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
This is an Ethernet port operating at half duplex
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.
Path selections and Packet switching.

33. In a switched LAN network - What is the Spanning-Tree algorithm used for?
802.3ab and 802.3z
It is used to prevent switching loops in networks with redundant switched routes.
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.
Physical Layer and Datalink Layer

34. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application

35. Which of the following services use TCP?
SMTP FTP and HTTP
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.
Layer 4
Buffering - Cut-through - and Congestion avoidance

36. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Show cdp neighbor detail
Application
TCP
VTP

37. 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.
Duplex mismatch
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Telnet and FTP

38. By default - which of the following factors determines the spanning-tree path cost?
Encapsulations PPP and authentication CHAP
802.3ab and 802.3z
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.

39. 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
MAC Address and Bridge Priority
The sequence number in the TCP header.
It operates without collisions and It provides faster data transfer
Transport

40. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Switches increase the number of collision domains in the network.
Information about a route should never be sent back in the direction from which the original update came.

41. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 3
An additional broadcast domain will be created.

42. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In an improperly implemented redundant topology
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

43. 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?
Certkiller B > trace
It operates without collisions and It provides faster data transfer
CertK Switch(config)# ip default-gateway 192.168.1.115
Physical Layer and Datalink Layer

44. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
It is used to prevent switching loops in networks with redundant switched routes.
The network layer
Switches - Bridges - and Routers
Serial0/1 is down - line protocol is down

45. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
A hub and A repeater.
The sequence number in the TCP header.
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.
Show arp and Show interface

46. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The switch will forward the frame to a specific port
Congestion avoidance - Windowing and Buffering
Network
Layer 4

47. 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
Auto - Desirable - and On
VTP will allow switches to share VLAN configuration information
Device Identifiers - Capabilities list - Platform
VLAN and Swtich

48. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
The interfaces must be configured for NAT.
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 switch will forward the frame to a specific port

49. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
VTP
MAC Address and Bridge Priority
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

50. Which fields are included in the TCP header?
Path selections and Packet switching.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Physical Layer and Datalink Layer
Source Port - Acknowledgment Number - and Window