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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. 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?
Switches increase the number of collision domains 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
The network layer

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?
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
ARP and ICMP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Increased latency and Filtering of all frame errors

3. Which protocol uses TCP port 443 at layer 4?
Network
HTTPS
SMTP - FTP - HTTP - and HTTPS
Application

4. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Port security

5. 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 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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same 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.
Information about a route should never be sent back in the direction from which the original update came.

6. 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?
Learning - Listening - and Forwarding
ARP and ICMP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Device Identifiers - Capabilities list - Platform

7. What is the IEEE standard associated with Gigabit Ethernet?
All switch and bridge ports are in either the forwarding or blocking state.
802.3ab and 802.3z
The sequence number in the TCP header.
The network layer

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
SMTP - FTP - HTTP - and HTTPS
It is the sum of the costs based on bandwidth
VTP will allow switches to share VLAN configuration information
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

9. 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?
To prevent switching loops in networks with redundant switched paths.
Certkiller B > trace
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

10. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
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 system is malfunctioning.

11. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Path selections and Packet switching.
Layer 4
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

12. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network
The switch will forward the frame to a specific port

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?
It is used to prevent switching loops in networks with redundant switched routes.
Path selections and Packet switching.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.

14. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.
Data link
This is an Ethernet port operating at half duplex

15. Which of the following can lead to the contribution of LAN traffic congestion?
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.
Physical Layer and Datalink Layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Device Identifiers - Capabilities list - Platform

16. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Certkiller B > trace
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.
Layer 3

17. 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?
This is an Ethernet port operating at half duplex
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Transport

18. Which of the protocols below use TCP at the transport layer?
SMTP FTP and HTTP
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.
SMTP - FTP - HTTP - and HTTPS

19. Which of the following correctly describe steps in the OSI date encapsulation process?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
MAC Address and Bridge Priority
A hub and A repeater.
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.

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
It is the sum of the costs based on bandwidth
Application

21. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It is used to prevent switching loops in networks with redundant switched routes.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Network
It operates without collisions and It provides faster data transfer

22. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
A cross-over cable
Configure the switch so that it has a lower priority than other switches in the network.
Buffering - Cut-through - and Congestion avoidance
Encapsulations PPP and authentication CHAP

23. 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?
Network
Sequence number - Window size - and Acknowledgment number
To prevent switching loops in networks with redundant switched paths.
VTP will allow switches to share VLAN configuration information

24. Which of the following are types of flow control?
This is an Ethernet port operating at half duplex
ARP and ICMP
Buffering - Cut-through - and Congestion avoidance
Serial0/1 is down - line protocol is down

25. 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?
It is the sum of the costs based on bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low 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.
CertK Switch(config)# ip default-gateway 192.168.1.115

26. 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
MAC Address and 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
The port is experiencing errors

27. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
HTTPS - SMTP - and TFTP
The port is experiencing errors
HTTPS
The system is malfunctioning.

28. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
To prevent switching loops in networks with redundant switched paths.
100 meters
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.
Switches increase the number of collision domains in the network.

29. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
A cross-over cable
The port is experiencing errors
Source Port - Acknowledgment Number - and Window

30. CDP is running between two CK devices. What information is supplied by CDP?
Duplex mismatch
Switches increase the number of collision domains in the network.
HTTPS - SMTP - and TFTP
Device Identifiers - Capabilities list - Platform

31. 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?
Transport
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
802.1Q and ISL

32. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
A broadcast address will never be the source address of a frame
Telnet and FTP
Layer 3
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

33. 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?
To allow remote management of the switch.
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
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.

34. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Auto - On - and Desirable
Telnet and FTP
STP
Data link

35. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
To prevent switching loops in networks with redundant switched paths.
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.
Layer 4

36. 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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37. 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?
The port is experiencing errors
Application
VTP
HTTPS

38. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
SMTP - FTP - HTTP - and HTTPS
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering

39. 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
It will prevent segment 1's broadcasts from getting to segment 2.
The sequence number in the TCP header.
Fiber optic cable.
It operates without collisions and It provides faster data transfer

40. 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?
Sequence number - Window size - and Acknowledgment number
TCP
Buffering - Cut-through - and Congestion avoidance
100 meters

41. Which fields are included in the TCP header?
Fiber optic cable.
SMTP FTP and HTTP
Data link
Source Port - Acknowledgment Number - and Window

42. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
An electrical pulse indicates that the collision has cleared.
TCP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

43. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The system is malfunctioning.
This is an Ethernet port operating at half duplex
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 4

44. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Buffering - Cut-through - and Congestion avoidance
Transport
Encapsulations PPP and authentication CHAP
SMTP FTP and HTTP

45. Which of the following are spanning tree port states?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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
Port security

46. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Decrease the window size.
VTP
Layer 3
All switch and bridge ports are in either the forwarding or blocking state.

47. 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?
The port is experiencing errors
VTP will allow switches to share VLAN configuration information
The interfaces must be configured for NAT.
VTP

48. Which OSI layer header contains the address of a destination host that is on another network?
Serial0/1 is down - line protocol is down
Decrease the window size.
Network
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

49. 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?
To allow remote management of the switch.
Auto - Desirable - and On
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport

50. 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.
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS - SMTP - and TFTP
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.