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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. Which of the protocols below use TCP at the transport layer?
Application
Physical Layer and Datalink Layer
SMTP - FTP - HTTP - and HTTPS
Encapsulations PPP and authentication CHAP

2. 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?
Data link
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP

3. 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?
VTP
Increased latency and Filtering of all frame errors
The interfaces must be configured for NAT.
Hosts use a logical bus topology

4. With regard to Ethernet media access methods - which of the following are true?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
100 meters
STP
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.

5. 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
It is the sum of the costs based on bandwidth
To allow remote management of the switch.
The network layer
A hub and A repeater.

6. Which of the following correctly describe steps in the OSI date encapsulation process?
Transport
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.
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 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

7. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The network layer
Auto - Desirable - and On
Switches - Bridges - and Routers

8. 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
VLAN and Swtich
Data link
Auto - On - and Desirable
Packet switching - Packet filtering and Internetwork communication.

9. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
It is the sum of the costs based on bandwidth
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.
Port security

10. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
VTP
Increased latency and Filtering of all frame errors
Layer 3

11. Which of the following are true of Ethernet technology?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Hosts use a logical bus topology
Decrease the window size.
To allow remote management of the switch.

12. 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
A broadcast address will never be the source address of a frame
VLAN and Swtich
STP

13. 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.)
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
MAC Address and Bridge Priority
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

14. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Application
Data link
Learning - Listening - and Forwarding
All switch and bridge ports are in either the forwarding or blocking state.

15. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Show cdp neighbor detail
Duplex mismatch

16. 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?
A broadcast address will never be the source address of a frame
Layer 3
This is an Ethernet port operating at half duplex
The Bridgeg ID and The bridge priority

17. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Layer 4
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.
A broadcast address will never be the source address of a frame

18. 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
To allow remote management of the switch.
Information about a route should never be sent back in the direction from which the original update came.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Show cdp neighbor detail
In an improperly implemented redundant topology
Application
Duplex mismatch

20. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Network
Data link
Show arp and Show interface

21. Which protocol uses TCP port 443 at layer 4?
HTTPS
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.
To allow remote management of the switch.
The interfaces must be configured for NAT.

22. 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?
Show cdp neighbor detail
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

23. Which of the following are types of flow control?
Certkiller B > trace
The system is malfunctioning.
Information about a route should never be sent back in the direction from which the original update came.
Buffering - Cut-through - and Congestion avoidance

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

25. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
ARP and ICMP
Switches increase the number of collision domains in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.

26. By default - which of the following factors determines the spanning-tree path cost?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
In an improperly implemented redundant topology

27. 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 - SMTP - and TFTP
Decrease the window size.
Sequence number - Window size - and Acknowledgment number
Information about a route should never be sent back in the direction from which the original update came.

28. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The switch will forward the frame to a specific port
802.1Q and ISL
A broadcast address will never be the source address of a frame
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

29. 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?
Certkiller B > trace
Application
It is used to prevent switching loops in networks with redundant switched routes.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

30. What are two characteristics of 'store and forward' switching?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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
CertK Switch(config)# ip default-gateway 192.168.1.115

31. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
To allow remote management of the switch.
Layer 3
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

32. What is the IEEE standard associated with Gigabit Ethernet?
VLAN and Swtich
802.3ab and 802.3z
STP
Network

33. 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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34. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Network
To prevent switching loops in networks with redundant switched paths.
802.3ab and 802.3z

35. 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?
VTP
STP
CertK Switch(config)# ip default-gateway 192.168.1.115
The system is malfunctioning.

36. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Sequence number - Window size - and Acknowledgment number
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.
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.

37. 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
The sequence number in the TCP header.
The system is malfunctioning.
Configure the switch so that it has a lower priority than other switches in the network.
The network layer

38. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
It is the sum of the costs based on bandwidth
Layer 4
Packet switching - Packet filtering and Internetwork communication.

39. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
Transport
Fiber optic cable.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The sequence number in the TCP header.

40. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

41. 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.
Increased latency and Filtering of all frame errors
Application
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.
MAC Address and Bridge Priority

42. 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?
Information about a route should never be sent back in the direction from which the original update came.
The Bridgeg ID and The bridge priority
ARP and ICMP
Encapsulations PPP and authentication CHAP

43. 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?
An electrical pulse indicates that the collision has cleared.
Port security
Duplex mismatch
To allow remote management of the switch.

44. 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?
Layer 3
Increased latency and Filtering of all frame errors
Auto - Desirable - and On
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

45. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
The Bridgeg ID and The bridge priority
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.
Device Identifiers - Capabilities list - Platform
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.

46. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
This is an Ethernet port operating at half duplex
HTTPS
TCP

47. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
Transport
VTP

48. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
The network layer
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

49. 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?
Show arp and Show interface
The port is experiencing errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
SMTP FTP and HTTP

50. Which fields are included in the TCP header?
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.
A hub and A repeater.
Source Port - Acknowledgment Number - and Window
The sequence number in the TCP header.