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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. 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
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.
Decrease the window size.
The network layer
In an improperly implemented redundant topology

2. 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?
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
802.3ab and 802.3z

3. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Network
Switches increase the number of collision domains in the network.
Telnet and FTP

4. 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
Transport
The sequence number in the TCP header.
All switch and bridge ports are in either the forwarding or blocking state.
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

5. What are two characteristics of 'store and forward' switching?
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.
It is the sum of the costs based on bandwidth
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

6. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
An electrical pulse indicates that the collision has cleared.
Layer 4
Duplex mismatch
Path selections and Packet switching.

7. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Telnet and FTP
Learning - Listening - and Forwarding
ARP and ICMP

8. 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?
Device Identifiers - Capabilities list - Platform
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL
CertK Switch(config)# ip default-gateway 192.168.1.115

9. Which fields are included in the TCP header?
Hosts use a logical bus topology
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.
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
Source Port - Acknowledgment Number - and Window

10. 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?
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Data link
To allow remote management of the switch.

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 operates without collisions and It provides faster data transfer
Transport
The interfaces must be configured for NAT.
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.

12. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
VTP
The Bridgeg ID and The bridge priority
STP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

13. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface
Auto - On - and Desirable
Encapsulations PPP and authentication CHAP

14. 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
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.
Decrease the window size.

15. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The network layer
Configure the switch so that it has a lower priority than other switches in the network.
Auto - On - and Desirable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

16. Which two of the following values does STP take into consideration when it elects the root bridge?
Packet switching - Packet filtering and Internetwork communication.
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.
Switches - Bridges - and Routers
The Bridgeg ID and The bridge priority

17. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
It operates without collisions and It provides faster data transfer
Network
This is an Ethernet port operating at half duplex

18. In a switched LAN network - What is the Spanning-Tree algorithm used for?
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
ARP and ICMP
It is used to prevent switching loops in networks with redundant switched routes.

19. 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
MAC Address and Bridge Priority
Application
Buffering - Cut-through - and Congestion avoidance
VLAN and Swtich

20. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
Sequence number - Window size - and Acknowledgment number
The sequence number in the TCP header.
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
SMTP - FTP - HTTP - and HTTPS

21. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Configure the switch so that it has a 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.
Path selections and Packet switching.
The system is malfunctioning.

22. 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
Learning - Listening - and Forwarding
Data link
Auto - On - and Desirable
SMTP - FTP - HTTP - and HTTPS

23. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.

24. By default - which of the following factors determines the spanning-tree path cost?
The interfaces must be configured for NAT.
It is the sum of the costs based on bandwidth
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
STP

25. 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
Source Port - Acknowledgment Number - and Window
It is the sum of the costs based on bandwidth
VTP will allow switches to share VLAN configuration information
Fiber optic cable.

26. 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.
Buffering - Cut-through - and Congestion avoidance
The Bridgeg ID and The bridge priority
Encapsulations PPP and authentication CHAP

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

28. Which of the following are true of Ethernet technology?
Source Port - Acknowledgment Number - and Window
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.
Hosts use a logical bus topology
802.3ab and 802.3z

29. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port

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?
To prevent switching loops in networks with redundant switched paths.
Data link
A hub and A repeater.
Show cdp neighbor detail

31. 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
Configure the switch so that it has lower priority than other switches in the network
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It operates without collisions and It provides faster data transfer

32. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
100 meters
Layer 4
The sequence number in the TCP header.
The network layer

33. 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
Information about a route should never be sent back in the direction from which the original update came.
HTTPS - SMTP - and TFTP
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.
SMTP - FTP - HTTP - and HTTPS

34. 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?
To prevent switching loops in networks with redundant switched paths.
The switch will forward the frame to a specific port
Congestion avoidance - Windowing and Buffering
Transport

35. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Learning - Listening - and Forwarding
Telnet and FTP
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

36. 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?
HTTPS
Show cdp neighbor detail
VTP
MAC Address and Bridge Priority

37. 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?
Sequence number - Window size - and Acknowledgment number
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Duplex mismatch

38. What is the IEEE standard associated with Gigabit Ethernet?
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.
Configure the switch so that it has a lower priority than other switches in the network.
This is an Ethernet port operating at half duplex
802.3ab and 802.3z

39. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Data link
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.
Application

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
The sequence number in the TCP header.
This is an Ethernet port operating at half duplex
Switches - Bridges - and Routers
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

41. 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.
It operates without collisions and It provides faster data transfer
All switch and bridge ports are in either the forwarding or blocking state.
In an improperly implemented redundant topology

42. 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?
An electrical pulse indicates that the collision has cleared.
Increased latency and Filtering of all frame errors
Port security
Configure the switch so that it has a lower priority than other switches in the network.

43. 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?
The network layer
Decrease the window size.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance

44. 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)
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
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
Device Identifiers - Capabilities list - Platform

45. 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?
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.
An additional broadcast domain will be created.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

46. 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?
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast address will never be the source address of a frame
This is an Ethernet port operating at half duplex
Switches increase the number of collision domains in the network.

47. 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?
Fiber optic cable.
An additional broadcast domain will be created.
Increased latency and Filtering of all frame errors
A cross-over cable

48. Which of the following devices can the Certkiller network administrator use to segment the LAN?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Port security
Switches - Bridges - and Routers
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

49. 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?
The interfaces must be configured for NAT.
Source Port - Acknowledgment Number - and Window
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The network layer

50. 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.)
It operates without collisions and It provides faster data transfer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Learning - Listening - and Forwarding
MAC Address and Bridge Priority