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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 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?
802.1Q and ISL
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.
A hub and A repeater.
Layer 4

2. 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
Layer 4
Source Port - Acknowledgment Number - and Window
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

3. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network
Layer 4
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The Bridgeg ID and The bridge priority
The port is experiencing errors
Layer 4

5. 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
Layer 3
Show arp and Show interface
A hub and A repeater.

6. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - On - and Desirable
The sequence number in the TCP header.
Fiber optic cable.

7. 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?
The system is malfunctioning.
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers

8. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
802.1Q and ISL
Show cdp neighbor detail
Application
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.

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 network layer
Configure the switch so that it has a lower priority than other switches in the network.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.

10. Which of the following are spanning tree port states?
TCP
Serial0/1 is down - line protocol is down
Learning - Listening - and Forwarding
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

11. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network
100 meters

12. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
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
Network

13. 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.
Transport
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
Data link

14. With regard to Ethernet media access methods - which of the following are true?
An electrical pulse indicates that the collision has cleared.
To allow remote management of the switch.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

15. 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 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.
All switch and bridge ports are in either the forwarding or blocking state.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

16. 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
To prevent switching loops in networks with redundant switched paths.
Data link
SMTP - FTP - HTTP - and HTTPS

17. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
It will prevent segment 1's broadcasts from getting to segment 2.
A hub and A repeater.
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

18. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Certkiller B > trace
Switches increase the number of collision domains in the network.
A cross-over cable
All switch and bridge ports are in either the forwarding or blocking state.

19. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Certkiller B > trace
All switch and bridge ports are in either the forwarding or blocking state.
SMTP - FTP - HTTP - and HTTPS

20. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
Network
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
A cross-over cable
Application

21. Which three of the protocols below belong to the application layer? (Select three answer choices)
Decrease the window size.
The Bridgeg ID and The bridge priority
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
HTTPS - SMTP - and TFTP

22. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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.
A cross-over cable
Encapsulations PPP and authentication CHAP
Layer 3

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?
Data link
The network layer
VLAN and Swtich
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

24. 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
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 switch will forward the frame to a specific port
A hub and A repeater.

25. 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.
An electrical pulse indicates that the collision has cleared.
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.

27. 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?

28. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
SMTP FTP and HTTP
The network layer
The system is malfunctioning.

29. Which of the following correctly describe the various functions and virtues of a router?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Packet switching - Packet filtering and Internetwork communication.
An electrical pulse indicates that the collision has cleared.
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.

30. Which of the following are true of Ethernet technology?
Physical Layer and Datalink Layer
Show cdp neighbor detail
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology

31. 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?
An electrical pulse indicates that the collision has cleared.
Show arp and Show interface
The port is experiencing errors
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.

32. 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
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.
Data link
HTTPS
Certkiller B > trace

33. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP
To allow remote management of the switch.
It is the sum of the costs based on bandwidth

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?
Show cdp neighbor detail
Auto - Desirable - and On
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

35. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Packet switching - Packet filtering and Internetwork communication.
HTTPS
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches increase the number of collision domains in the network.

36. 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?
100 meters
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
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.

37. 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?
Decrease the window size.
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
It operates without collisions and It provides faster data transfer

38. What are two characteristics of 'store and forward' switching?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
A broadcast address will never be the source address of a frame

39. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Configure the switch so that it has a lower priority than other switches 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.
Telnet and FTP
This is an Ethernet port operating at half duplex

40. Which fields are included in the TCP header?
VTP
Source Port - Acknowledgment Number - and Window
Switches increase the number of collision domains in the network.
100 meters

41. 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?
The network layer
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 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
An electrical pulse indicates that the collision has cleared.

42. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The switch will forward the frame to a specific port
A broadcast address will never be the source address of a frame
The interfaces must be configured for NAT.

43. 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?
VTP will allow switches to share VLAN configuration information
Application
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
A broadcast address will never be the source address of a frame

44. 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?
This is an Ethernet port operating at half duplex
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Increased latency and Filtering of all frame errors
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

45. Which of the following can lead to the contribution of LAN traffic congestion?
The Bridgeg ID and The bridge priority
Layer 4
TCP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

46. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Data link
Auto - Desirable - and On
SMTP - FTP - HTTP - and HTTPS
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

47. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Switches increase the number of collision domains in the network.
A cross-over cable
It operates without collisions and It provides faster data transfer
Layer 3

48. 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
Buffering - Cut-through - and Congestion avoidance
HTTPS
Duplex mismatch
Port security

49. 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?
802.3ab and 802.3z
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The switch will forward the frame to a specific port
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

50. Which of the protocols below use TCP at the transport layer?
Data link
SMTP - FTP - HTTP - and HTTPS
An additional broadcast domain will be created.
Application