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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. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Path selections and Packet switching.
Layer 4
In an improperly implemented redundant topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

2. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
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.
802.1Q and ISL
Auto - On - and Desirable
This is an Ethernet port operating at half duplex

3. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Serial0/1 is down - line protocol is down
Packet switching - Packet filtering and Internetwork communication.
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.

4. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
The switch will forward the frame to a specific port
Path selections and Packet switching.
Encapsulations PPP and authentication CHAP
An electrical pulse indicates that the collision has cleared.

5. 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?
Application
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.
Network
VLAN and Swtich

6. 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?
Sequence number - Window size - and Acknowledgment number
Telnet and FTP
Application
Packet switching - Packet filtering and Internetwork communication.

7. Which fields are included in the TCP header?
Auto - On - and Desirable
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has lower priority than other switches in the network
Increased latency and Filtering of all frame errors

8. 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
Sequence number - Window size - and Acknowledgment number
Port security
It is used to prevent switching loops in networks with redundant switched routes.
Data link

9. 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?
Increased latency and Filtering of all frame errors
Layer 4
Congestion avoidance - Windowing and Buffering
Port security

10. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Source Port - Acknowledgment Number - and Window
100 meters
Auto - On - and Desirable
In an improperly implemented redundant topology

11. 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?
Application
VTP
A hub and A repeater.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

12. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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
Switches - Bridges - and Routers

13. Which of the following services use TCP?
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
To allow remote management of the switch.
Buffering - Cut-through - and Congestion avoidance
SMTP FTP and HTTP

14. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
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
The Bridgeg ID and The bridge priority
To allow remote management of the switch.

15. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Learning - Listening - and Forwarding
An electrical pulse indicates that the collision has cleared.
Packet switching - Packet filtering and Internetwork communication.
TCP

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 network layer
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.

17. 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?
In an improperly implemented redundant topology
Configure the switch so that it has lower priority than other switches in the network
It is the sum of the costs based on bandwidth
Configure the switch so that it has a lower priority than other switches in the network.

18. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
SMTP - FTP - HTTP - and HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
ARP and ICMP
The Bridgeg ID and The bridge priority

19. With regard to Ethernet media access methods - which of the following are true?
Encapsulations PPP and authentication CHAP
Learning - Listening - and Forwarding
Physical Layer and Datalink Layer
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.

20. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The sequence number in the TCP header.
VTP will allow switches to share VLAN configuration information
TCP
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.

21. 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
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Layer 4

22. 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?
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
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.
802.1Q and ISL

23. 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?
The sequence number in the TCP header.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
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

24. 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?
Hosts use a logical bus topology
Decrease the window size.
Network
This is an Ethernet port operating at half duplex

25. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
Application
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 - SMTP - and TFTP

26. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Buffering - Cut-through - and Congestion avoidance
Layer 4
Switches - Bridges - and Routers

27. 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?
Buffering - Cut-through - and Congestion avoidance
Certkiller B > trace
Encapsulations PPP and authentication CHAP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

28. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A broadcast address will never be the source address of a frame
Information about a route should never be sent back in the direction from which the original update came.
A cross-over cable

29. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 4
STP
The sequence number in the TCP header.

30. 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?
STP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP will allow switches to share VLAN configuration information
Show arp and Show interface

31. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
An additional broadcast domain will be created.
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

32. Which protocol uses TCP port 443 at layer 4?
HTTPS
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The interfaces must be configured for NAT.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

33. Which of the following correctly describe the various functions and virtues of a 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
An additional broadcast domain will be created.
Telnet and FTP
Packet switching - Packet filtering and Internetwork communication.

34. 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?
STP
Data link
The network layer
TCP

35. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Show arp and Show interface
The port is experiencing errors
Network
Switches increase the number of collision domains in the network.

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.)
MAC Address and Bridge Priority
Source Port - Acknowledgment Number - and Window
Layer 3
Congestion avoidance - Windowing and Buffering

37. 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?
Switches increase the number of collision domains in the network.
Buffering - Cut-through - and Congestion avoidance
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
802.1Q and ISL

38. Which three of the protocols below belong to the application layer? (Select three answer choices)
Layer 4
Show cdp neighbor detail
HTTPS - SMTP - and TFTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

39. 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
Physical Layer and Datalink Layer
Duplex mismatch
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

40. 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?
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
Layer 3
Configure the switch so that it has a lower priority than other switches in the network.

41. 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?
Decrease the window size.
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
TCP

42. 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
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
The interfaces must be configured for NAT.

43. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
An electrical pulse indicates that the collision has cleared.
Transport
The network layer
The sequence number in the TCP header.

44. 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.
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.
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. 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?
Telnet and FTP
HTTPS - SMTP - and TFTP
Data link
Sequence number - Window size - and Acknowledgment number

46. 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
Network
Transport
SMTP - FTP - HTTP - and HTTPS

47. 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?
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.
802.1Q and ISL
100 meters
SMTP - FTP - HTTP - and HTTPS

48. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
This is an Ethernet port operating at half duplex
SMTP FTP and HTTP
VTP

49. 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?

50. What are two characteristics of 'store and forward' switching?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
Switches - Bridges - and Routers