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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 three of the protocols below belong to the application layer? (Select three answer choices)
Data link
HTTPS - SMTP - and TFTP
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.
The Bridgeg ID and The bridge priority

2. 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?
Serial0/1 is down - line protocol is down
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors
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

3. Which of the following are true of Ethernet technology?
The Bridgeg ID and The bridge priority
Hosts use a logical bus topology
It is used to prevent switching loops in networks with redundant switched routes.
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.

4. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
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
100 meters

5. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP will allow switches to share VLAN configuration information
Network

6. 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
The Bridgeg ID and The bridge priority
Duplex mismatch
Configure the switch so that it has lower priority than other switches in the 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.

7. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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 address will never be the source address of a frame
Physical Layer and Datalink Layer

8. 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?
The interfaces must be configured for NAT.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Telnet and FTP
VTP

9. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
Layer 3
Buffering - Cut-through - and Congestion avoidance
The Bridgeg ID and The bridge priority

10. 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?
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
The network layer
Show arp and Show interface

11. 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 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.
HTTPS - SMTP - and TFTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

12. 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 hub and A repeater.
Serial0/1 is down - line protocol is down
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
ARP and ICMP

13. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Auto - Desirable - and On
Path selections and Packet switching.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

14. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Serial0/1 is down - line protocol is down
Data link
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
Encapsulations PPP and authentication CHAP

15. By default - which of the following factors determines the spanning-tree path cost?
The sequence number in the TCP header.
Data link
It is the sum of the costs based on 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.

16. 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?
Telnet and FTP
VTP
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 Bridgeg ID and The bridge priority

17. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the 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.
The switch will forward the frame to a specific port
Switches increase the number of collision domains in the 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.

18. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Sequence number - Window size - and Acknowledgment number
Congestion avoidance - Windowing and Buffering

19. 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.
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.
VTP will allow switches to share VLAN configuration information
It is the sum of the costs based on bandwidth

20. 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.
Data link
Layer 3
The switch will forward the frame to a specific port

21. Which protocol uses TCP port 443 at layer 4?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show arp and Show interface
HTTPS
The switch will forward the frame to a specific port

22. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
VTP
The Bridgeg ID and The bridge priority
Switches increase the number of collision domains in the network.
Information about a route should never be sent back in the direction from which the original update came.

23. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
Data link
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.

24. 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?
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.
Learning - Listening - and Forwarding
Show cdp neighbor detail
The system is malfunctioning.

25. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
It is used to prevent switching loops in networks with redundant switched routes.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.
Data link

26. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
VTP will allow switches to share VLAN configuration information
Data link
Hosts use a logical bus topology

27. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Data link
This is an Ethernet port operating at half duplex
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window

28. 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?
An additional broadcast domain will be created.
MAC Address and Bridge Priority
CertK Switch(config)# ip default-gateway 192.168.1.115
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.

29. What is the IEEE standard associated with Gigabit Ethernet?
VTP will allow switches to share VLAN configuration information
802.3ab and 802.3z
A hub and A repeater.
STP

30. What is the purpose of the spanning-tree algorithm in a switched LAN?
Transport
Physical Layer and Datalink Layer
A hub and A repeater.
To prevent switching loops in networks with redundant switched paths.

31. 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?
Port security
Sequence number - Window size - and Acknowledgment number
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The sequence number in the TCP header.

32. Which of the following can lead to the contribution of LAN traffic congestion?
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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

33. 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?
To allow remote management of the switch.
Increased latency and Filtering of all frame errors
Layer 3
Decrease the window size.

34. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
It is used to prevent switching loops in networks with redundant switched routes.
Network
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.

35. 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?
SMTP - FTP - HTTP - and HTTPS
Switches - Bridges - and Routers
The switch will forward the frame to a specific port
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

36. 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 port is experiencing errors
It will prevent segment 1's broadcasts from getting to segment 2.
Decrease the window size.
802.3ab and 802.3z

37. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Hosts use a logical bus topology
Configure the switch so that it has a lower priority than other switches in the network.
Data link
Layer 4

38. 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?
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.
Application
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

39. 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
Congestion avoidance - Windowing and Buffering
Source Port - Acknowledgment Number - and Window
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

40. Which fields are included in the TCP header?
Duplex mismatch
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Certkiller B > trace
Source Port - Acknowledgment Number - and Window

41. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

42. Which of the protocols below use TCP at the transport layer?
802.1Q and ISL
Network
SMTP - FTP - HTTP - and HTTPS
Application

43. 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?
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.
Configure the switch so that it has a lower priority than other switches in the network.
To allow remote management of the switch.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

44. 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 and HTTP
802.3ab and 802.3z
The interfaces must be configured for NAT.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

45. 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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46. Which OSI layer header contains the address of a destination host that is on another network?
Switches - Bridges - and Routers
Physical Layer and Datalink Layer
Network
The network layer

47. 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?
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 throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
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.

48. 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?
Sequence number - Window size - and Acknowledgment number
Configure the switch so that it has lower priority than other switches in the network
Layer 4
Source Port - Acknowledgment Number - and Window

49. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
A hub and A repeater.
Application
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
STP

50. Which of the following devices can the Certkiller network administrator use to segment the LAN?
SMTP - FTP - HTTP - and HTTPS
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers
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.