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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. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The Bridgeg ID and The bridge priority
Layer 4
MAC Address and Bridge Priority
Decrease the window size.

2. 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?
The switch will forward the frame to a specific port
A hub and A repeater.
STP
This is an Ethernet port operating at half duplex

3. Which of the following devices can the Certkiller network administrator use to segment the LAN?
To prevent switching loops in networks with redundant switched paths.
To allow remote management of the switch.
Device Identifiers - Capabilities list - Platform
Switches - Bridges - and Routers

4. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS - SMTP - and TFTP
Decrease the window size.

5. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A hub and A repeater.
Learning - Listening - and Forwarding
It is used to prevent switching loops in networks with redundant switched routes.
ARP and ICMP

6. 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?
Layer 3
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
Certkiller B > trace
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

7. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Learning - Listening - and Forwarding
STP
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 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.

8. 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 system is malfunctioning.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
Auto - Desirable - and On

9. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
To prevent switching loops in networks with redundant switched paths.
TCP
Auto - On - and Desirable
100 meters

10. 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
SMTP - FTP - HTTP - and HTTPS
Network
Application

11. Which of the following are true of Ethernet technology?
HTTPS
Hosts use a logical bus topology
Fiber optic cable.
The interfaces must be configured for NAT.

12. 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.)
Physical Layer and Datalink Layer
Data link
Hosts use a logical bus topology
MAC Address and Bridge Priority

13. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Switches - Bridges - and Routers
Path selections and Packet switching.
ARP and ICMP
Physical Layer and Datalink Layer

14. By default - which of the following factors determines the spanning-tree path cost?
Fiber optic cable.
Telnet and FTP
Transport
It is the sum of the costs based on bandwidth

15. 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?
Port security
This is an Ethernet port operating at half duplex
VTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

16. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Learning - Listening - and Forwarding
Decrease the window size.
SMTP - FTP - HTTP - and HTTPS
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.

17. Which OSI layer header contains the address of a destination host that is on another network?
Network
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The Bridgeg ID and The bridge priority
Fiber optic cable.

18. 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?
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
Device Identifiers - Capabilities list - Platform
Certkiller B > trace

19. 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
802.3ab and 802.3z
Data link
Duplex mismatch

20. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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 system is malfunctioning.
VTP will allow switches to share VLAN configuration information

21. Which two of the following values does STP take into consideration when it elects the root bridge?
Physical Layer and Datalink Layer
This is an Ethernet port operating at half duplex
The Bridgeg ID and The bridge priority
The port is experiencing errors

22. 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?
802.1Q and ISL
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
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.

23. Which protocol uses TCP port 443 at layer 4?
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
HTTPS
Certkiller B > trace

24. 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?
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
Configure the switch so that it has a lower priority than other switches 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.

25. 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.
100 meters
Auto - On - and Desirable
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Application

26. 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
Show cdp neighbor detail
Learning - Listening - and Forwarding
Layer 4

27. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4

28. 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?
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 network layer
Source Port - Acknowledgment Number - and Window
Network

29. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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
A broadcast address will never be the source address of a frame
VTP will allow switches to share VLAN configuration information

30. Which of the following services use TCP?
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
SMTP FTP and HTTP
TCP

31. 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?
Increased latency and Filtering of all frame errors
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
The sequence number in the TCP header.

32. 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 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
Layer 4
Telnet and FTP

33. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
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
Transport
The switch will forward the frame to a specific port

34. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
MAC Address and Bridge Priority
Application
Switches increase the number of collision domains in the network.
Telnet and FTP

35. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
SMTP - FTP - HTTP - and HTTPS
802.1Q and ISL
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.
Decrease the window size.

36. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
HTTPS
STP
100 meters

37. 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?
The switch will forward the frame to a specific port
It will prevent segment 1's broadcasts from getting to segment 2.
Congestion avoidance - Windowing and Buffering
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

38. Which of the following are types of flow control?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.
Application

39. Which of the following are spanning tree port states?
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL
This is an Ethernet port operating at half duplex
Learning - Listening - and Forwarding

40. CDP is running between two CK devices. What information is supplied by CDP?
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 network layer
Device Identifiers - Capabilities list - Platform
Application

41. 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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42. 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 network layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Telnet and FTP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

43. 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?
To prevent switching loops in networks with redundant switched paths.
Certkiller B > trace
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

44. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Configure the switch so that it has lower priority than other switches in the network
Port security
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

45. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Information about a route should never be sent back in the direction from which the original update came.
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.
Auto - On - and Desirable
All switch and bridge ports are in either the forwarding or blocking state.

46. 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?
Show cdp neighbor detail
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
Source Port - Acknowledgment Number - and Window

47. 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?
Configure the switch so that it has lower priority than other switches in the network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding
Configure the switch so that it has a lower priority than other switches in the network.

48. With regard to Ethernet media access methods - which of the following are true?
The network layer
Packet switching - Packet filtering and Internetwork communication.
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.
Learning - Listening - and Forwarding

49. 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?
Path selections and Packet switching.
Switches increase the number of collision domains in the network.
Data link
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

50. 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
Certkiller B > trace
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Sequence number - Window size - and Acknowledgment number