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. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
A cross-over cable
Increased latency and Filtering of all frame errors

2. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
100 meters
To prevent switching loops in networks with redundant switched paths.
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

3. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
To prevent switching loops in networks with redundant switched paths.
Encapsulations PPP and authentication CHAP
Port security
Packet switching - Packet filtering and Internetwork communication.

4. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
Network
This is an Ethernet port operating at half duplex
The port is experiencing errors
Data link

5. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Buffering - Cut-through - and Congestion avoidance
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It operates without collisions and It provides faster data transfer

6. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Sequence number - Window size - and Acknowledgment number
ARP and ICMP
Telnet and FTP

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?
It operates without collisions and It provides faster data transfer
Configure the switch so that it has lower priority than other switches in the network
Learning - Listening - and Forwarding
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

8. Which OSI layer header contains the address of a destination host that is on another network?
Decrease the window size.
Network
To prevent switching loops in networks with redundant switched paths.
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.

9. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
802.1Q and ISL
Serial0/1 is down - line protocol is down

10. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
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 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?
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
Configure the switch so that it has lower priority than other switches in the network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The interfaces must be configured for NAT.

12. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
802.3ab and 802.3z
ARP and ICMP
STP
CertK Switch(config)# ip default-gateway 192.168.1.115

13. 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.)
SMTP FTP and HTTP
MAC Address and Bridge Priority
All switch and bridge ports are in either the forwarding or blocking state.
Auto - Desirable - and On

14. What is the IEEE standard associated with Gigabit Ethernet?
A hub and A repeater.
802.3ab and 802.3z
Hosts use a logical bus topology
STP

15. 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?
Show cdp neighbor detail
CertK Switch(config)# ip default-gateway 192.168.1.115
STP
Decrease the window size.

16. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
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.
Application
SMTP FTP and HTTP

17. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Layer 3
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Packet switching - Packet filtering and Internetwork communication.

18. Which two of the following values does STP take into consideration when it elects the root bridge?
A broadcast address will never be the source address of a frame
Certkiller B > trace
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
The Bridgeg ID and The bridge priority

19. 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?
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
CertK Switch(config)# ip default-gateway 192.168.1.115
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

20. 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.
SMTP FTP and HTTP
Learning - Listening - and Forwarding
TCP

21. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
All switch and bridge ports are in either the forwarding or blocking state.
SMTP FTP and HTTP
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

22. CDP is running between two CK devices. What information is supplied by CDP?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.
Device Identifiers - Capabilities list - Platform
Data link

23. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
It is used to prevent switching loops in networks with redundant switched routes.
Information about a route should never be sent back in the direction from which the original update came.
It will prevent segment 1's broadcasts from getting to segment 2.
VLAN and Swtich

24. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
TCP
Packet switching - Packet filtering and Internetwork communication.
Learning - Listening - and Forwarding
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

25. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Source Port - Acknowledgment Number - and Window
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Physical Layer and Datalink Layer
Auto - Desirable - and On

26. Which three of the protocols below belong to the application layer? (Select three answer choices)
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application
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

27. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Application
A cross-over cable
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

28. 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?
Show arp and Show interface
Telnet and FTP
MAC Address and Bridge Priority
ARP and ICMP

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?
Telnet and FTP
Data link
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.

30. Which of the following services use TCP?
Serial0/1 is down - line protocol is down
Fiber optic cable.
SMTP FTP and HTTP
Encapsulations PPP and authentication CHAP

31. 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?
Certkiller B > trace
Source Port - Acknowledgment Number - and Window
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering

32. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Layer 3
A cross-over cable
HTTPS - SMTP - and TFTP
VTP will allow switches to share VLAN configuration information

33. 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?
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
100 meters
It operates without collisions and It provides faster data transfer
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

34. 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
Layer 4
VLAN and Swtich
A broadcast address will never be the source address of a frame
Telnet and FTP

35. 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 sequence number in the TCP header.
Decrease the window size.
VTP
Information about a route should never be sent back in the direction from which the original update came.

36. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
TCP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The network layer

37. 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?
Duplex mismatch
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A hub and A repeater.
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.

38. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Network
Show cdp neighbor detail
Physical Layer and Datalink Layer

39. 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?
Too many hosts in a broadcast domain - 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.
Show cdp neighbor detail
A hub and A repeater.

40. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Auto - Desirable - and On
In an improperly implemented redundant topology
802.1Q and ISL
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

41. 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?
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.
Auto - On - and Desirable
ARP and ICMP
It is the sum of the costs based on bandwidth

42. 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
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
Network

43. 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.
Path selections and Packet switching.
Data link
Application
802.1Q and ISL

44. 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.
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.
SMTP - FTP - HTTP - and HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

45. Which fields are included in the TCP header?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Source Port - Acknowledgment Number - and Window
The interfaces must be configured for NAT.
All switch and bridge ports are in either the forwarding or blocking state.

46. What is the purpose of the spanning-tree algorithm in a switched LAN?
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
The Bridgeg ID and The bridge priority
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.

47. 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?
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.
VLAN and Swtich
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

48. What are two characteristics of 'store and forward' switching?
Application
The system is malfunctioning.
Auto - Desirable - and On
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

49. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
100 meters
It operates without collisions and It provides faster data transfer
Duplex mismatch

50. 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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
Auto - On - and Desirable