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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?
Congestion avoidance - Windowing and Buffering
Switches increase the number of collision domains in the network.
The interfaces must be configured for NAT.
SMTP - FTP - HTTP - and HTTPS

2. Which protocol uses TCP port 443 at layer 4?
A broadcast address will never be the source address of a frame
HTTPS
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.
Source Port - Acknowledgment Number - and Window

3. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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.
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex
A cross-over cable

4. 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
Switches increase the number of collision domains in the network.
Telnet and FTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Sequence number - Window size - and Acknowledgment number

5. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
A broadcast address will never be the source address of a frame
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115

6. 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?
VTP
Application
An electrical pulse indicates that the collision has cleared.
Auto - Desirable - and On

7. 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
802.1Q and ISL
Path selections and Packet switching.
Application

8. Which of the following services use TCP?
SMTP FTP and HTTP
100 meters
SMTP - FTP - HTTP - and HTTPS
An electrical pulse indicates that the collision has cleared.

9. 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?
It is the sum of the costs based on bandwidth
A cross-over cable
Physical Layer and Datalink Layer
Network

10. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It is used to prevent switching loops in networks with redundant switched routes.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Source Port - Acknowledgment Number - and Window

11. Which of the following are types of flow control?
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.
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface
Network

12. 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?
The interfaces must be configured for NAT.
The network layer
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4

13. 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?
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.
Data link
Port security

14. Which OSI layer header contains the address of a destination host that is on another network?
Data link
Physical Layer and Datalink Layer
Configure the switch so that it has a lower priority than other switches in the network.
Network

15. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Certkiller B > trace
A broadcast address will never be the source address of a frame
Configure the switch so that it has a lower priority than other switches in the network.
Encapsulations PPP and authentication CHAP

16. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Configure the switch so that it has a lower priority than other switches in the network.
VTP will allow switches to share VLAN configuration information
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

17. Which of the following are true of Ethernet technology?
An electrical pulse indicates that the collision has cleared.
Hosts use a logical bus topology
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 interfaces must be configured for NAT.

18. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Switches - Bridges - and Routers
Port security
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.
Auto - Desirable - and On

19. 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?
Switches increase the number of collision domains in the network.
Port security
The interfaces must be configured for NAT.
Certkiller B > trace

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

21. 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
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
An electrical pulse indicates that the collision has cleared.
Decrease the window size.
The sequence number in the TCP header.

22. 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?
Show arp and Show interface
This is an Ethernet port operating at half duplex
An electrical pulse indicates that the collision has cleared.
The port is experiencing errors

23. 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
The sequence number in the TCP header.
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.
Data link

24. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Layer 3
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
TCP

25. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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
VLAN and Swtich
Path selections and Packet switching.
Configure the switch so that it has lower priority than other switches in the network

26. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Source Port - Acknowledgment Number - and Window
802.1Q and ISL
The network layer
SMTP - FTP - HTTP - and HTTPS

27. 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
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

28. 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
Device Identifiers - Capabilities list - Platform
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

29. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
HTTPS
Layer 4
Network
Source Port - Acknowledgment Number - and Window

30. 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?
Application
ARP and ICMP
Device Identifiers - Capabilities list - Platform
An electrical pulse indicates that the collision has cleared.

31. 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?
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
STP
It is the sum of the costs based on bandwidth

32. 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?
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.
Configure the switch so that it has a lower priority than other switches in the network.
It will prevent segment 1's broadcasts from getting to segment 2.
Certkiller B > trace

33. 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?
Show arp and Show interface
All switch and bridge ports are in either the forwarding or blocking state.
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.

34. 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?
100 meters
Data link
CertK Switch(config)# ip default-gateway 192.168.1.115
Decrease the window size.

35. 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?
SMTP FTP and HTTP
Data link
Increased latency and Filtering of all frame errors
Device Identifiers - Capabilities list - Platform

36. 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?
To allow remote management of the switch.
All switch and bridge ports are in either the forwarding or blocking state.
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.
Congestion avoidance - Windowing and Buffering

37. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers
Configure the switch so that it has lower priority than other switches in the network

38. 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?
In an improperly implemented redundant topology
VLAN and Swtich
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.
Switches increase the number of collision domains in the network.

39. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Switches increase the number of collision domains in the network.
MAC Address and Bridge Priority
STP
TCP

40. Which two of the following values does STP take into consideration when it elects the root bridge?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Physical Layer and Datalink Layer
The Bridgeg ID and The bridge priority

41. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
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.

42. 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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43. What is the purpose of the spanning-tree algorithm in a switched LAN?
VLAN and Swtich
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
To prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer

44. 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?
Telnet and FTP
SMTP - FTP - HTTP - and HTTPS
Fiber optic cable.
It is used to prevent switching loops in networks with redundant switched routes.

45. 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.
The interfaces must be configured for NAT.
MAC Address and Bridge Priority
Duplex mismatch

46. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The network layer
Serial0/1 is down - line protocol is down
It is the sum of the costs based on bandwidth

47. 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?
The port is experiencing errors
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Congestion avoidance - Windowing and Buffering

48. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
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.
Switches - Bridges - and Routers
The system is malfunctioning.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

49. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
It is the sum of the costs based on bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
In an improperly implemented redundant topology
Switches increase the number of collision domains in the network.

50. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Port security
Show cdp neighbor detail
The port is experiencing errors