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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. 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?
An additional broadcast domain will be created.
Full-duplex Ethernet can provide higher throughput 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.
All switch and bridge ports are in either the forwarding or blocking state.

2. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Packet switching - Packet filtering and Internetwork communication.
STP
ARP and ICMP
It is used to prevent switching loops in networks with redundant switched routes.

3. 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?
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.
Show cdp neighbor detail
Packet switching - Packet filtering and Internetwork communication.
Sequence number - Window size - and Acknowledgment number

4. 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?
Information about a route should never be sent back in the direction from which the original update came.
SMTP - FTP - HTTP - and HTTPS
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

5. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The interfaces must be configured for NAT.
A hub and A repeater.
802.1Q and ISL
A cross-over cable

6. Which of the protocols below use TCP at the transport layer?
Packet switching - Packet filtering and Internetwork communication.
SMTP - FTP - HTTP - and HTTPS
STP
Port security

7. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
The sequence number in the TCP header.
An electrical pulse indicates that the collision has cleared.
All switch and bridge ports are in either the forwarding or blocking state.

8. 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?
HTTPS
Port security
The sequence number in the TCP header.
All switch and bridge ports are in either the forwarding or blocking state.

9. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Full-duplex Ethernet can provide higher throughput 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.
Auto - Desirable - and On
Switches increase the number of collision domains in the network.

10. Which of the following are spanning tree port states?
The system is malfunctioning.
Learning - Listening - and Forwarding
To prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer

11. 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?
Learning - Listening - and Forwarding
Telnet and FTP
To allow remote management of the switch.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

12. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VLAN and Swtich
The interfaces must be configured for NAT.
Switches increase the number of collision domains in the network.

13. 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?
Serial0/1 is down - line protocol is down
Configure the switch so that it has a lower priority than other switches in the network.
Data link
The interfaces must be configured for NAT.

14. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VLAN and Swtich
Show arp and Show interface

15. 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
Encapsulations PPP and authentication CHAP
Data link
Network

16. 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?
ARP and ICMP
Encapsulations PPP and authentication CHAP
100 meters
The switch will forward the frame to a specific port

17. What are two characteristics of 'store and forward' switching?
The switch will forward the frame to a specific port
Device Identifiers - Capabilities list - Platform
Congestion avoidance - Windowing and Buffering
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

18. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Device Identifiers - Capabilities list - Platform
An electrical pulse indicates that the collision has cleared.
Telnet and FTP

19. With regard to Ethernet media access methods - which of the following are true?
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
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

20. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Application
HTTPS - SMTP - and TFTP
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

21. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
100 meters

22. 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?
Data link
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
100 meters
An additional broadcast domain will be created.

23. 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?
An additional broadcast domain will be created.
Configure the switch so that it has a lower priority than other switches in the network.
ARP and ICMP
MAC Address and Bridge Priority

24. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS - SMTP - and TFTP
Layer 4
An additional broadcast domain will be created.

25. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Congestion avoidance - Windowing and Buffering
Physical Layer and Datalink Layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Path selections and Packet switching.

26. 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?
ARP and ICMP
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A hub and A repeater.

27. 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.
Layer 3
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.

28. 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?
Congestion avoidance - Windowing and Buffering
It will prevent segment 1's broadcasts from getting to segment 2.
Layer 4
Serial0/1 is down - line protocol is down

29. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The port is experiencing errors
Learning - Listening - and Forwarding
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

30. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Auto - Desirable - and On
Fiber optic cable.
Configure the switch so that it has a lower priority than other switches in the network.
Path selections and Packet switching.

31. 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.
Auto - Desirable - and On
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.
Transport

32. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Auto - Desirable - and On
All switch and bridge ports are in either the forwarding or blocking state.
Encapsulations PPP and authentication CHAP
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.

33. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
An electrical pulse indicates that the collision has cleared.
Layer 4
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

34. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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
Auto - Desirable - and On
VTP
Data link

35. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Path selections and Packet switching.
TCP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 4

36. 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
STP
The sequence number in the TCP header.
Show cdp neighbor detail
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

37. 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
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 hub and A repeater.
The interfaces must be configured for NAT.

38. Which protocol uses TCP port 443 at layer 4?
HTTPS
Data link
An electrical pulse indicates that the collision has cleared.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

39. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Increased latency and Filtering of all frame errors
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.
Serial0/1 is down - line protocol is down
In an improperly implemented redundant topology

40. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
SMTP - FTP - HTTP - and HTTPS
HTTPS - SMTP - and TFTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

41. What is the IEEE standard associated with Gigabit Ethernet?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Data link
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
802.3ab and 802.3z

42. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
It operates without collisions and It provides faster data transfer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - On - and Desirable

43. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
HTTPS - SMTP - and TFTP
In an improperly implemented redundant topology
100 meters
Data link

44. 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?
Physical Layer and Datalink Layer
Transport
CertK Switch(config)# ip default-gateway 192.168.1.115
100 meters

45. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
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
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail

46. 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
It will prevent segment 1's broadcasts from getting to segment 2.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
All switch and bridge ports are in either the forwarding or blocking state.
Layer 3

47. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
Packet switching - Packet filtering and Internetwork communication.
Increased latency and Filtering of all frame errors
VTP will allow switches to share VLAN configuration information

48. 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?
A cross-over cable
802.3ab and 802.3z
Switches increase the number of collision domains in the network.
Configure the switch so that it has lower priority than other switches in the network

49. 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
It is used to prevent switching loops in networks with redundant switched routes.
Show arp and Show interface
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.

50. Which of the following can lead to the contribution of LAN traffic congestion?
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - Desirable - and On