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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 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?
Network
TCP
Duplex mismatch
The network layer

2. 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?
Source Port - Acknowledgment Number - and Window
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Duplex mismatch
This is an Ethernet port operating at half duplex

3. 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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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?
Source Port - Acknowledgment Number - and Window
The network layer
Auto - On - and Desirable
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

5. 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?
HTTPS
Physical Layer and Datalink 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
Sequence number - Window size - and Acknowledgment number

6. Which OSI layer header contains the address of a destination host that is on another 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.
Network
Data link
An additional broadcast domain will be created.

7. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Congestion avoidance - Windowing and Buffering
Serial0/1 is down - line protocol is down
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It operates without collisions and It provides faster data transfer

8. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Fiber optic cable.
Switches increase the number of collision domains in the network.
Auto - On - and Desirable
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.

9. Which of the following correctly describe steps in the OSI date encapsulation process?
ARP and ICMP
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 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.

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?
Fiber optic cable.
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.
To prevent switching loops in networks with redundant switched paths.
To allow remote management of the switch.

11. 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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The network layer
STP
An additional broadcast domain will be created.

12. Which of the following correctly describe the various functions and virtues of a router?
Fiber optic cable.
A hub and A repeater.
Packet switching - Packet filtering and Internetwork communication.
802.1Q and ISL

13. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

14. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
TCP
All switch and bridge ports are in either the forwarding or blocking state.

15. With regard to Ethernet media access methods - which of the following are true?
A broadcast address will never be the source address of a frame
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 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.
It operates without collisions and It provides faster data transfer

16. 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?
Show arp and Show interface
Congestion avoidance - Windowing and Buffering
The system is malfunctioning.
SMTP - FTP - HTTP - and HTTPS

17. Which of the following are spanning tree port states?
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
Fiber optic cable.
The port is experiencing errors
Learning - Listening - and Forwarding

18. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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.
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
Data link
Switches increase the number of collision domains in the network.

19. 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?
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A hub and A repeater.
Decrease the window size.

20. 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?
The interfaces must be configured for NAT.
Configure the switch so that it has a lower priority than other switches in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network

21. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Physical Layer and Datalink Layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Port security
VLAN and Swtich

22. 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?
SMTP - FTP - HTTP - and HTTPS
Application
The network layer
Increased latency and Filtering of all frame errors

23. 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?
The Bridgeg ID and The bridge priority
Learning - Listening - and Forwarding
Path selections and Packet switching.
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

24. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
802.3ab and 802.3z
A broadcast address will never be the source address of a frame
Show arp and Show interface
Network

25. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Fiber optic cable.
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.
VTP will allow switches to share VLAN configuration information
STP

26. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
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
Hosts use a logical bus topology

27. 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
Duplex mismatch
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 3
In an improperly implemented redundant topology

28. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
Sequence number - Window size - and Acknowledgment number
VTP
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. 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
Network
The sequence number in the TCP header.
It is used to prevent switching loops in networks with redundant switched routes.

30. 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
Show arp and Show interface
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
The interfaces must be configured for NAT.

31. Which protocol uses TCP port 443 at layer 4?
Learning - Listening - and Forwarding
Port security
HTTPS
Physical Layer and Datalink Layer

32. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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
Information about a route should never be sent back in the direction from which the original update came.
Application
This is an Ethernet port operating at half duplex

33. 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?
ARP and ICMP
Certkiller B > trace
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology

34. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Layer 4
The system is malfunctioning.
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.
Information about a route should never be sent back in the direction from which the original update came.

35. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
It operates without collisions and It provides faster data transfer
Device Identifiers - Capabilities list - Platform
The network layer
Encapsulations PPP and authentication CHAP

36. 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.)
Application
Configure the switch so that it has lower priority than other switches in the network
MAC Address and Bridge Priority
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

37. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
100 meters
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

38. What is the IEEE standard associated with Gigabit Ethernet?
Layer 4
Data link
802.3ab and 802.3z
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

39. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Encapsulations PPP and authentication CHAP
HTTPS - SMTP - and TFTP
The system is malfunctioning.
Path selections and Packet switching.

40. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
VTP
MAC Address and Bridge Priority
The network layer
Layer 4

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?
Congestion avoidance - Windowing and Buffering
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 interfaces must be configured for NAT.
The network layer

42. Which of the following can lead to the contribution of LAN traffic congestion?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
In an improperly implemented redundant topology
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To prevent switching loops in networks with redundant switched paths.

43. 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
Duplex mismatch
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.
Decrease the window size.

44. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Certkiller B > trace
Device Identifiers - Capabilities list - Platform
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same 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.

45. 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?
To allow remote management of the switch.
Port security
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.
Buffering - Cut-through - and Congestion avoidance

46. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Telnet and FTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches - Bridges - and Routers
Layer 3

47. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Network
802.1Q and ISL
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Switches increase the number of collision domains in the network.

48. Which three of the protocols below belong to the application layer? (Select three answer choices)
Encapsulations PPP and authentication CHAP
HTTPS - SMTP - and TFTP
Configure the switch so that it has lower priority than other switches in the network
The network layer

49. Which of the following are true of Ethernet technology?
An additional broadcast domain will be created.
This is an Ethernet port operating at half duplex
To allow remote management of the switch.
Hosts use a logical bus topology

50. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
ARP and ICMP
The system is malfunctioning.
SMTP - FTP - HTTP - and HTTPS