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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. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
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.
A cross-over cable
Layer 4

2. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
Port security
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
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.

3. 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?
The Bridgeg ID and The bridge priority
The interfaces must be configured for NAT.
An additional broadcast domain will be created.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

4. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
The interfaces must be configured for NAT.

5. 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.)
An electrical pulse indicates that the collision has cleared.
Telnet and FTP
MAC Address and Bridge Priority
It is the sum of the costs based on bandwidth

6. Which of the following correctly describe steps in the OSI date encapsulation process?
Application
Auto - On - and Desirable
Increased latency and Filtering of all frame errors
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.

7. 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.
An additional broadcast domain will be created.
Port security
Source Port - Acknowledgment Number - and Window

8. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
It is used to prevent switching loops in networks with redundant switched routes.
CertK Switch(config)# ip default-gateway 192.168.1.115
Network
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

9. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Sequence number - Window size - and Acknowledgment number

10. 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?
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.
Physical Layer and Datalink Layer
Congestion avoidance - Windowing and Buffering
ARP and ICMP

11. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
VTP will allow switches to share VLAN configuration information
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

12. 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?

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13. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Port security
Layer 4
The system is malfunctioning.
The switch will forward the frame to a specific port

14. 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?
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
Show arp and Show interface
A hub and A repeater.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

15. 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?
Data link
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
Increased latency and Filtering of all frame errors
Congestion avoidance - Windowing and Buffering

16. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An additional broadcast domain will be created.
Show arp and Show interface
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

17. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Configure the switch so that it has a lower priority than other switches in the 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
HTTPS - SMTP - and TFTP

18. 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?
Data link
Buffering - Cut-through - and Congestion avoidance
Layer 3
To allow remote management of the switch.

19. 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
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.
An electrical pulse indicates that the collision has cleared.
ARP and ICMP

20. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
A broadcast address will never be the source address of a frame
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.
In an improperly implemented redundant topology
To prevent switching loops in networks with redundant switched paths.

21. Which of the following services use TCP?
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP FTP and HTTP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To allow remote management of the switch.

22. 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.
Show cdp neighbor detail
Data link
Certkiller B > trace

23. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Device Identifiers - Capabilities list - Platform
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.
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has a lower priority than other switches in the network.

24. 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?
VLAN and Swtich
Configure the switch so that it has a lower priority than other switches in the network.
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link
It is the sum of the costs based on bandwidth

26. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
VTP will allow switches to share VLAN configuration information
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
SMTP - FTP - HTTP - and HTTPS

27. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
VTP
STP
A hub and A repeater.

28. 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
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
VLAN and Swtich
All switch and bridge ports are in either the forwarding or blocking state.
Layer 3

29. 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
Increased latency and Filtering of all frame errors
Learning - Listening - and Forwarding
Decrease the window size.

30. 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.
Sequence number - Window size - and Acknowledgment number
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115

31. Which of the protocols below use TCP at the transport layer?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP - FTP - HTTP - and HTTPS
Switches - Bridges - and Routers
Source Port - Acknowledgment Number - and Window

32. 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.
To allow remote management of the switch.
Application
VLAN and Swtich
100 meters

33. Which OSI layer header contains the address of a destination host that is on another network?
STP
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Network

34. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Serial0/1 is down - line protocol is down
VLAN and Swtich
Switches - Bridges - and Routers

35. In a switched LAN network - What is the Spanning-Tree algorithm used for?
An additional broadcast domain will be created.
To prevent switching loops in networks with redundant switched paths.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.

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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It operates without collisions and It provides faster data transfer
The network layer
Serial0/1 is down - line protocol is down

37. 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.
The network layer
SMTP - FTP - HTTP - and HTTPS

38. With regard to Ethernet media access methods - which of the following are true?
Physical Layer and Datalink Layer
Path selections and Packet switching.
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

39. Which two of the following values does STP take into consideration when it elects the root bridge?
A cross-over cable
Fiber optic cable.
MAC Address and Bridge Priority
The Bridgeg ID and The bridge priority

40. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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 increase the number of collision domains in the network.
Auto - On - and Desirable

41. What kind of cable should be used to establish a trunked line between two Catalyst switches?
TCP
A cross-over cable
Decrease the window size.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

42. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Congestion avoidance - Windowing and Buffering
ARP and ICMP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

43. 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
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link

44. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
VTP will allow switches to share VLAN configuration information
All switch and bridge ports are in either the forwarding or blocking state.
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

45. Which protocol uses TCP port 443 at layer 4?
HTTPS
Buffering - Cut-through - and Congestion avoidance
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP FTP and HTTP

46. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free 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.
The port is experiencing errors
STP
MAC Address and Bridge Priority

47. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
Network

48. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Learning - Listening - and Forwarding
All switch and bridge ports are in either the forwarding or blocking state.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

49. 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?
VTP
Configure the switch so that it has lower priority than other switches in the network
VLAN and Swtich
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

50. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
VLAN and Swtich
An electrical pulse indicates that the collision has cleared.
Path selections and Packet 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.