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. Which fields are included in the TCP header?
Information about a route should never be sent back in the direction from which the original update came.
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.
Source Port - Acknowledgment Number - and Window
Show arp and Show interface

2. Which three of the protocols below belong to the application layer? (Select three answer choices)
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Switches increase the number of collision domains 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.
HTTPS - SMTP - and TFTP

3. 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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The network layer
Packet switching - Packet filtering and Internetwork communication.
Network

4. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Certkiller B > trace
It is used to prevent switching loops in networks with redundant switched routes.
Network
Switches increase the number of collision domains in the network.

5. 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?
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.
Auto - On - and Desirable
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS

6. 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
It is the sum of the costs based on bandwidth
802.1Q and ISL
Auto - Desirable - and On

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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Configure the switch so that it has lower priority than other switches in the network
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 throughout than can half-duplex Ethernet of the same bandwidth

8. What is the purpose of the spanning-tree algorithm in a switched LAN?
A hub and A repeater.
Certkiller B > trace
To prevent switching loops in networks with redundant switched paths.
Sequence number - Window size - and Acknowledgment number

9. 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?
This is an Ethernet port operating at half duplex
Path selections and Packet switching.
Network
An additional broadcast domain will be created.

10. Why is full-duplex Ethernet superior to its single-duplex counterpart?
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 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.
It operates without collisions and It provides faster data transfer
Auto - Desirable - and On

11. With regard to Ethernet media access methods - which of the following are true?
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.
VTP
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.

12. 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?
ARP and ICMP
Decrease the window size.
Layer 3
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

13. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
Buffering - Cut-through - and Congestion avoidance
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches in the network.

14. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
All switch and bridge ports are in either the forwarding or blocking state.
Device Identifiers - Capabilities list - Platform
SMTP - FTP - HTTP - and HTTPS

15. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
A broadcast address will never be the source address of a frame
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Learning - Listening - and Forwarding
This is an Ethernet port operating at half duplex

16. 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.
The sequence number in the TCP header.
HTTPS - SMTP - and TFTP
CertK Switch(config)# ip default-gateway 192.168.1.115

17. 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
VLAN and Swtich
Increased latency and Filtering of all frame errors
Layer 4
Device Identifiers - Capabilities list - Platform

18. Which two of the following values does STP take into consideration when it elects the root bridge?
Certkiller B > trace
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The Bridgeg ID and The bridge priority

19. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Auto - Desirable - and On

20. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Telnet and FTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
An additional broadcast domain will be created.

21. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
Device Identifiers - Capabilities list - Platform
802.3ab and 802.3z

22. Which of the following services use TCP?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

23. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS - SMTP - and TFTP

24. 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.
MAC Address and Bridge Priority
Fiber optic cable.
The Bridgeg ID and The bridge priority

25. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
Auto - On - and Desirable
Port security
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

26. 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
It is the sum of the costs based on bandwidth
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Transport

27. 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
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.
Duplex mismatch
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.

28. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP will allow switches to share VLAN configuration information
Physical Layer and Datalink Layer
Layer 3

29. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A broadcast address will never be the source address of a frame
The system is malfunctioning.
It is the sum of the costs based on bandwidth

30. 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?
Transport
Duplex mismatch
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.
A hub and A repeater.

31. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Increased latency and Filtering of all frame errors
It is the sum of the costs based on bandwidth
Physical Layer and Datalink Layer
Network

32. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
To allow remote management of the switch.
HTTPS - SMTP - and TFTP
All switch and bridge ports are in either the forwarding or blocking state.
It is the sum of the costs based on bandwidth

33. 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.
Configure the switch so that it has lower priority than other switches in the network
Increased latency and Filtering of all frame errors
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
Application

34. 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?
Network
The system is malfunctioning.
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

35. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP

36. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
VLAN and Swtich
TCP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It is used to prevent switching loops in networks with redundant switched routes.

37. Which of the following are types of flow control?
A hub and A repeater.
Layer 3
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
Buffering - Cut-through - and Congestion avoidance

38. 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?
A hub and A repeater.
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.
VTP

39. What kind of cable should be used to establish a trunked line between two Catalyst switches?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A cross-over cable
It is the sum of the costs based on bandwidth
MAC Address and Bridge Priority

40. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
SMTP FTP and HTTP
Switches - Bridges - and Routers
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.

41. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
VTP
MAC Address and Bridge Priority
Layer 4
The sequence number in the TCP header.

42. 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 switch will forward the frame to a specific port
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Port security
Congestion avoidance - Windowing and Buffering

43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Layer 4
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.
Network
This is an Ethernet port operating at half duplex

44. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Auto - On - and Desirable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
In an improperly implemented redundant topology
Serial0/1 is down - line protocol is down

45. CDP is running between two CK devices. What information is supplied by CDP?
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.
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.
Device Identifiers - Capabilities list - Platform
Layer 4

46. 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.
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Information about a route should never be sent back in the direction from which the original update came.

47. 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?
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
It operates without collisions and It provides faster data transfer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 4

48. Which protocol uses TCP port 443 at layer 4?
The Bridgeg ID and The bridge priority
A hub and A repeater.
HTTPS
Auto - On - and Desirable

49. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
VTP
Network
The port is experiencing errors

50. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
Increased latency and Filtering of all frame errors
STP
The interfaces must be configured for NAT.