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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. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
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.
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.
100 meters
A broadcast address will never be the source address of a frame

2. 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?
Buffering - Cut-through - and Congestion avoidance
Sequence number - Window size - and Acknowledgment number
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

3. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has lower priority than other switches in the network
SMTP - FTP - HTTP - and HTTPS
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

4. 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?
Application
Data link
Physical Layer and Datalink Layer
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.

5. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The sequence number in the TCP header.
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
Layer 4
Switches increase the number of collision domains in the network.

6. 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?
Port security
SMTP - FTP - HTTP - and HTTPS
Increased latency and Filtering of all frame errors
It will prevent segment 1's broadcasts from getting to segment 2.

7. 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?
Decrease the window size.
Data link
HTTPS
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

8. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Switches - Bridges - and Routers
Data link
Layer 4
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 protocol uses TCP port 443 at layer 4?
Congestion avoidance - Windowing and Buffering
In an improperly implemented redundant topology
TCP
HTTPS

10. 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
Physical Layer and Datalink Layer
The switch will forward the frame to a specific port
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

11. Which of the following can lead to the contribution of LAN traffic congestion?
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Sequence number - Window size - and Acknowledgment number
Auto - On - and Desirable

12. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Network
The interfaces must be configured for NAT.
Layer 4
Switches - Bridges - and Routers

13. 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?
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 will forward the frame to a specific port
It is used to prevent switching loops in networks with redundant switched routes.
Device Identifiers - Capabilities list - Platform

14. 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.
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.
Switches - Bridges - and Routers

15. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Telnet and FTP

16. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
It will prevent segment 1's broadcasts from getting to segment 2.
An electrical pulse indicates that the collision has cleared.
802.1Q and ISL
Switches increase the number of collision domains in the network.

17. 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
A hub and A repeater.
Encapsulations PPP and authentication CHAP
VTP will allow switches to share VLAN configuration information

18. 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?
The network layer
Certkiller B > trace
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

19. 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?
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show cdp neighbor detail
Buffering - Cut-through - and Congestion avoidance

20. 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
Switches increase the number of collision domains in the network.
Duplex mismatch
Learning - Listening - and Forwarding
An electrical pulse indicates that the collision has cleared.

21. Which OSI layer header contains the address of a destination host that is on another network?
Serial0/1 is down - line protocol is down
Network
The system is malfunctioning.
Learning - Listening - and Forwarding

22. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
The system is malfunctioning.
An additional broadcast domain will be created.
An electrical pulse indicates that the collision has cleared.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

23. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Fiber optic cable.
SMTP - FTP - HTTP - and HTTPS

24. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.

25. Which of the following are true of Ethernet technology?
CertK Switch(config)# ip default-gateway 192.168.1.115
The network layer
Hosts use a logical bus topology
A broadcast address will never be the source address of a frame

26. What is the IEEE standard associated with Gigabit Ethernet?
Physical Layer and Datalink Layer
802.3ab and 802.3z
An electrical pulse indicates that the collision has cleared.
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.

27. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
This is an Ethernet port operating at half duplex
Learning - Listening - and Forwarding
The system is malfunctioning.
STP

28. 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.)
SMTP - FTP - HTTP - and HTTPS
Port security
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
MAC Address and Bridge Priority

29. 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?
Transport
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The system is malfunctioning.
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.

30. 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.
A hub and A repeater.
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.
MAC Address and Bridge Priority

31. 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?
Duplex mismatch
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An additional broadcast domain will be created.
Layer 3

32. 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?
Increased latency and Filtering of all frame errors
The network layer
Congestion avoidance - Windowing and Buffering
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

33. 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?
VTP
ARP and ICMP
Packet switching - Packet filtering and Internetwork communication.
Configure the switch so that it has a lower priority than other switches in the network.

34. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Network

35. 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.
ARP and ICMP
The network layer
Path selections and Packet switching.

36. With regard to Ethernet media access methods - which of the following are true?
To allow remote management of the switch.
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.
To prevent switching loops in networks with redundant switched paths.
The network layer

37. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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
All switch and bridge ports are in either the forwarding or blocking state.
An additional broadcast domain will be created.

38. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Serial0/1 is down - line protocol is down
Layer 4
VLAN and Swtich

39. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
To allow remote management of the switch.
Data link
The switch will forward the frame to a specific port
VLAN and Swtich

40. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Congestion avoidance - Windowing and Buffering
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
Hosts use a logical bus topology

41. 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?
This is an Ethernet port operating at half duplex
Show cdp neighbor detail
Auto - Desirable - and On
SMTP FTP and HTTP

42. 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.
Transport
Source Port - Acknowledgment Number - and Window
Application
Fiber optic cable.

43. What is the purpose of the spanning-tree algorithm in a switched LAN?
The port is experiencing errors
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
To prevent switching loops in networks with redundant switched paths.

44. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
It will prevent segment 1's broadcasts from getting to segment 2.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Buffering - Cut-through - and Congestion avoidance

45. 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?
Application
STP
100 meters
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.

46. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It operates without collisions and It provides faster data transfer
VTP
802.3ab and 802.3z

47. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
An additional broadcast domain will be created.
VLAN and Swtich
Fiber optic cable.
Configure the switch so that it has a lower priority than other switches in the network.

48. 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?
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 interfaces must be configured for NAT.
HTTPS
Auto - Desirable - and On

49. 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
VLAN and Swtich
VTP will allow switches to share VLAN configuration information
Data link
The network layer

50. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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
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.
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.