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. 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?
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
VTP
It is the sum of the costs based on bandwidth

2. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
All switch and bridge ports are in either the forwarding or blocking state.

3. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
Layer 3
The Bridgeg ID and The bridge priority
The switch will forward the frame to a specific port

4. Which of the following are true of Ethernet technology?
Show arp and Show interface
To allow remote management of the switch.
It operates without collisions and It provides faster data transfer
Hosts use a logical bus topology

5. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Data link
Information about a route should never be sent back in the direction from which the original update came.
MAC Address and Bridge Priority
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

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?
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.
Layer 3
The interfaces must be configured for NAT.
100 meters

7. 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)
VTP will allow switches to share VLAN configuration information
Show arp and Show interface
It is used to prevent switching loops in networks with redundant switched routes.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

8. 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
Switches increase the number of collision domains in the network.
Certkiller B > trace
Increased latency and Filtering of all frame errors
VLAN and Swtich

9. 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?
The switch will forward the frame to a specific port
SMTP FTP and HTTP
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
It operates without collisions and It provides faster data transfer

10. Which protocol uses TCP port 443 at layer 4?
Information about a route should never be sent back in the direction from which the original update came.
HTTPS
The Bridgeg ID and The bridge priority
This is an Ethernet port operating at half duplex

11. 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?
To allow remote management of the switch.
Device Identifiers - Capabilities list - Platform
Layer 3
Network

12. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The port is experiencing errors
Auto - On - and Desirable
Congestion avoidance - Windowing and Buffering
Encapsulations PPP and authentication CHAP

13. 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?
To allow remote management of the switch.
Show cdp neighbor detail
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has a lower priority than other switches in the network.

14. 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.
TCP
Packet switching - Packet filtering and Internetwork communication.
All switch and bridge ports are in either the forwarding or blocking state.

15. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It is used to prevent switching loops in networks with redundant switched routes.
The system is malfunctioning.

16. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Information about a route should never be sent back in the direction from which the original update came.
In an improperly implemented redundant topology
To prevent switching loops in networks with redundant switched paths.

17. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Encapsulations PPP and authentication CHAP

18. 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?
Telnet and FTP
Congestion avoidance - Windowing and Buffering
An additional broadcast domain will be created.
Switches - Bridges - and Routers

19. Which OSI layer header contains the address of a destination host that is on another network?
Switches - Bridges - and Routers
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
Network
The sequence number in the TCP header.

20. 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?
ARP and ICMP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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

21. 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
Configure the switch so that it has lower priority than other switches in the network
HTTPS - SMTP - and TFTP
Fiber optic cable.
100 meters

22. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
CertK Switch(config)# ip default-gateway 192.168.1.115
100 meters
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 switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

23. With regard to Ethernet media access methods - which of the following are true?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
Switches increase the number of collision domains in the network.

24. 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?
Decrease the window size.
To allow remote management of the switch.
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

25. Which of the protocols below use TCP at the transport layer?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
SMTP - FTP - HTTP - and HTTPS
VTP
Hosts use a logical bus topology

26. 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?
Switches increase the number of collision domains in the network.
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 sequence number in the TCP header.
The network layer

27. Which of the following services use TCP?
Fiber optic cable.
STP
SMTP FTP and HTTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

28. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Telnet and FTP
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.
Fiber optic cable.

29. 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?
Data link
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology
A hub and A repeater.

30. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Data link
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.
Congestion avoidance - Windowing and Buffering

31. 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?
The system is malfunctioning.
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
802.3ab and 802.3z

32. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It is used to prevent switching loops in networks with redundant switched routes.
It operates without collisions and It provides faster data transfer
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
The system is malfunctioning.

33. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
TCP
Layer 3
Auto - Desirable - and On
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

34. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Path selections and Packet switching.

35. 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?
Information about a route should never be sent back in the direction from which the original update came.
This is an Ethernet port operating at half duplex
CertK Switch(config)# ip default-gateway 192.168.1.115
The system is malfunctioning.

36. Which of the following can lead to the contribution of LAN traffic congestion?
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
This is an Ethernet port operating at half duplex
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

37. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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 is used to prevent switching loops in networks with redundant switched routes.
Sequence number - Window size - and Acknowledgment number
To allow remote management of the switch.

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
ARP and ICMP
STP
SMTP FTP and HTTP

39. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
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.
The sequence number in the TCP header.
MAC Address and Bridge Priority

40. 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
SMTP - FTP - HTTP - and HTTPS
Learning - Listening - and Forwarding
The port is experiencing errors
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

41. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The port is experiencing errors
Sequence number - Window size - and Acknowledgment number
Configure the switch so that it has lower priority than other switches in the network

42. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Network
Transport
Layer 4
Telnet and FTP

43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VTP will allow switches to share VLAN configuration information
Data link
Configure the switch so that it has lower priority than other switches in the network
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.

44. CDP is running between two CK devices. What information is supplied by CDP?
VTP will allow switches to share VLAN configuration information
ARP and ICMP
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform

45. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Telnet and FTP
Layer 3
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP will allow switches to share VLAN configuration information

46. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Source Port - Acknowledgment Number - and Window
Switches increase the number of collision domains in the network.
VTP will allow switches to share VLAN configuration information
Data link

47. 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 cross-over cable
Application
Switches increase the number of collision domains in the network.
A hub and A repeater.

48. 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?
HTTPS - SMTP - and TFTP
Decrease the window size.
In an improperly implemented redundant topology
This is an Ethernet port operating at half duplex

49. 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
Network
Duplex mismatch
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link

50. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Switches - Bridges - and Routers
Encapsulations PPP and authentication CHAP
Packet switching - Packet filtering and Internetwork communication.