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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. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
It operates without collisions and It provides faster data transfer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The sequence number in the TCP header.

2. 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?
Switches increase the number of collision domains in the network.
An additional broadcast domain will be created.
A hub and A repeater.
Source Port - Acknowledgment Number - and Window

3. 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
The port is experiencing errors
VLAN and Swtich
ARP and ICMP

4. 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
Configure the switch so that it has a lower priority than other switches in the network.
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
Path selections and Packet switching.
The network layer

5. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Serial0/1 is down - line protocol is down
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 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.

6. Which of the following services use TCP?
SMTP FTP and HTTP
Certkiller B > trace
Packet switching - Packet filtering and Internetwork communication.
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.

7. 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
A broadcast address will never be the source address of a frame
Data link
A hub and A repeater.
TCP

8. 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
VTP will allow switches to share VLAN configuration information
Application
Buffering - Cut-through - and Congestion avoidance
Duplex mismatch

9. Which of the following can lead to the contribution of LAN traffic congestion?
Auto - On - and Desirable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Certkiller B > trace

10. What kind of cable should be used to establish a trunked line between two Catalyst switches?
VLAN and Swtich
Show arp and Show interface
A cross-over cable
Transport

11. 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.
Learning - Listening - and Forwarding
Data link
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

12. 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
Duplex mismatch
Configure the switch so that it has a lower priority than other switches in the network.
Network

13. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
The Bridgeg ID and The bridge priority
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS

14. 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.
Layer 3
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

15. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
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.
SMTP FTP and HTTP
To allow remote management of the switch.

16. 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
A cross-over cable
Sequence number - Window size - and Acknowledgment number
Packet switching - Packet filtering and Internetwork communication.

17. 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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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 hub and A repeater.
The network layer

18. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
It is the sum of the costs based on bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.
All switch and bridge ports are in either the forwarding or blocking state.

19. What are two characteristics of 'store and forward' switching?
VTP will allow switches to share VLAN configuration information
The network layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

20. 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?
ARP and ICMP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Sequence number - Window size - and Acknowledgment number
Serial0/1 is down - line protocol is down

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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
The sequence number in the TCP header.
802.3ab and 802.3z

22. 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?
Port security
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.

23. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Fiber optic cable.
All switch and bridge ports are in either the forwarding or blocking state.
Configure the switch so that it has lower priority than other switches in the network
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.

24. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
HTTPS - SMTP - and TFTP
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

25. 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?
Device Identifiers - Capabilities list - Platform
Configure the switch so that it has a lower priority than other switches in the network.
Layer 3
CertK Switch(config)# ip default-gateway 192.168.1.115

26. 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.
Network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Application
The interfaces must be configured for NAT.

27. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Transport
To allow remote management of the switch.
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.

28. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 4
HTTPS - SMTP - and TFTP
Encapsulations PPP and authentication CHAP

29. What is the purpose of the spanning-tree algorithm in a switched LAN?
Learning - Listening - and Forwarding
To prevent switching loops in networks with redundant switched paths.
Hosts use a logical bus topology
The interfaces must be configured for NAT.

30. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
This is an Ethernet port operating at half duplex
The network layer
Information about a route should never be sent back in the direction from which the original update came.

31. 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
The port is experiencing errors
Fiber optic cable.
VTP will allow switches to share VLAN configuration information
Switches increase the number of collision domains in the network.

32. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
A cross-over cable
An electrical pulse indicates that the collision has cleared.
Duplex mismatch
Network

33. 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
Physical Layer and Datalink Layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VLAN and Swtich
ARP and ICMP

34. What is the IEEE standard associated with Gigabit Ethernet?
Auto - On - and Desirable
The network layer
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
802.3ab and 802.3z

35. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
This is an Ethernet port operating at half duplex
It will prevent segment 1's broadcasts from getting to segment 2.
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

36. 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.
Encapsulations PPP and authentication CHAP
Application
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.

37. 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 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.
Decrease the window size.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show cdp neighbor detail

38. 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
Decrease the window size.
Fiber optic cable.
CertK Switch(config)# ip default-gateway 192.168.1.115

39. CDP is running between two CK devices. What information is supplied by CDP?
Hosts use a logical bus topology
Source Port - Acknowledgment Number - and Window
Device Identifiers - Capabilities list - Platform
Path selections and Packet switching.

40. 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?
Learning - Listening - and Forwarding
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

41. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
In an improperly implemented redundant topology
Certkiller B > trace
TCP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

42. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
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.
VTP

43. 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?
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.
Auto - Desirable - and On
VTP will allow switches to share VLAN configuration information
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

44. 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?
Learning - Listening - and Forwarding
Layer 3
The sequence number in the TCP header.
Serial0/1 is down - line protocol is down

45. 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
Physical Layer and Datalink 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.
Network

46. Which protocol uses TCP port 443 at layer 4?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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
HTTPS
802.3ab and 802.3z

47. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
It will prevent segment 1's broadcasts from getting to segment 2.
MAC Address and Bridge Priority
Data link

48. Which of the following correctly describe steps in the OSI date encapsulation process?
802.1Q and ISL
An electrical pulse indicates that the collision has cleared.
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 CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

49. Which OSI layer header contains the address of a destination host that is on another network?
Network
Switches increase the number of collision domains in the network.
Show arp and Show interface
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.

50. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
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.
The system is malfunctioning.
Sequence number - Window size - and Acknowledgment number