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Final Exam quiz 2

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Computer Science Quiz on Final Exam quiz 2, created by Gigel Gigel on 26/01/2020.
Gigel Gigel
Quiz by Gigel Gigel, updated more than 1 year ago
Gigel Gigel
Created by Gigel Gigel about 4 years ago
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Resource summary

Question 1

Question
Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
Image:
I206730v1n1 206730s (image/jpeg)
Answer
  • area A
  • area B
  • area C
  • area D

Question 2

Question
Three office workers are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other office workers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?
Answer
  • audio conference, financial transactions, web page
  • financial transactions, web page, audio conference
  • audio conference, web page, financial transactions
  • financial transactions, audio conference, web page

Question 3

Question
During normal operation, from which location do most Cisco switches and routers run the IOS?
Answer
  • RAM
  • flash
  • NVRAM
  • disk drive

Question 4

Question
A network administrator is making changes to the configuration of a router. After making the changes and verifying the results, the administrator issues the copy running-config startup-config command. What will happen after this command executes?
Answer
  • The configuration will be copied to flash.
  • The configuration will load when the router is restarted.
  • The new configuration file will replace the IOS file.
  • The changes will be lost when the router restarts.

Question 5

Question
What information does the loopback test provide?
Answer
  • The TCP/IP stack on the device is working correctly.
  • The device has end-to-end connectivity.
  • DHCP is working correctly.
  • The Ethernet cable is working correctly.
  • The device has the correct IP address on the network.

Question 6

Question
What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?
Answer
  • The switch places the new CRC value in the FCS field and forwards the frame.
  • The switch notifies the source of the bad frame.
  • The switch drops the frame.
  • The switch floods the frame to all ports except the port through which the frame arrived to notify the hosts of the error.

Question 7

Question
Which destination address is used in an ARP request frame?
Answer
  • 0.0.0.0
  • 255.255.255.255
  • FFFF.FFFF.FFFF
  • 127.0.0.1
  • 01-00-5E-00-AA-23

Question 8

Question
What is the auto-MDIX feature on a switch?
Answer
  • the automatic configuration of an interface for 10/100/1000 Mb/s operation
  • the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection
  • the automatic configuration of full-duplex operation over a single Ethernet copper or optical cable
  • the ability to turn a switch interface on or off accordingly if an active connection is detected

Question 9

Question
What are the two main components of Cisco Express Forwarding (CEF)? (Choose two.)
Answer
  • adjacency tables
  • MAC-address tables
  • routing tables
  • ARP tables
  • forwarding information base (FIB)

Question 10

Question
Which statement describes the sequence of processes executed by a router when it receives a packet from a host to be delivered to a host on another network?
Answer
  • It receives the packet and forwards it directly to the destination host.
  • It de-encapsulates the packet, selects the appropriate path, and encapsulates the packet to forward it toward the destination host
  • It de-encapsulates the packet and forwards it toward the destination host.
  • It selects the path and forwards it toward the destination host.

Question 11

Question
Refer to the exhibit. Router R1 has two interfaces that were configured with correct IP addresses and subnet masks. Why does the show ip route command output not display any information about the directly connected networks??
Image:
I208840v1n3 Fig 6.2.2 208840 (image/png)
Answer
  • The directly connected networks have to be created manually to be displayed in the routing table.
  • The routing table will only display information about these networks when the router receives a packet.
  • The no shutdown command was not issued on these interfaces.
  • The gateway of last resort was not configured.

Question 12

Question
What happens when part of an Internet television transmission is not delivered to the destination?
Answer
  • A delivery failure message is sent to the source host.
  • The part of the television transmission that was lost is re-sent.
  • The entire transmission is re-sent.
  • The transmission continues without the missing portion.

Question 13

Question
Which three statements characterize the transport layer protocols? (Choose three.)
Answer
  • TCP and UDP port numbers are used by application layer protocols.
  • TCP uses port numbers to provide reliable transportation of IP packets.
  • UDP uses windowing and acknowledgments for reliable transfer of data.
  • TCP uses windowing and sequencing to provide reliable transfer of data.
  • TCP is a connection-oriented protocol. UDP is a connectionless protocol.

Question 14

Question
Which statement is true regarding the UDP client process during a session with a server?
Answer
  • Datagrams that arrive in a different order than that in which they were sent are not placed in order.
  • A session must be established before datagrams can be exchanged.
  • A three-way handshake takes place before the transmission of data begins.
  • Application servers have to use port numbers above 1024 in order to be UDP capable.

Question 15

Question
Which two components are configured via software in order for a PC to participate in a network environment? (Choose two.)
Answer
  • MAC address
  • IP address
  • kernel
  • shell
  • subnet mask

Question 16

Question
Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
Answer
  • It eliminates most address configuration errors.
  • it ensures that addresses are only applied to devices that require a permanent address.
  • It guarantees that every device that needs an address will get one.
  • It provides an address only to devices that are authorized to be connected to the network.
  • It reduces the burden on network support staff.

Question 17

Question
What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
Answer
  • 2001:DB8:BC15::0
  • 2001:DB8:BC15:A::0
  • 2001:DB8:BC15:A:1::1
  • 2001:DB8:BC15:A:12::0

Question 18

Question
What is the purpose of the network security authentication function?
Answer
  • to require users to prove who they are
  • to determine which resources a user can access
  • to keep track of the actions of a user
  • to provide challenge and response questions

Question 19

Question
Which type of wireless security makes use of dynamic encryption keys each time a client associates with an AP?
Answer
  • EAP
  • PSK
  • WEP
  • WPA

Question 20

Question
Which field in an IPv4 packet header will typically stay the same during its transmission?
Answer
  • Packet Length
  • Destination Address
  • Flag
  • Time-to-Live

Question 21

Question
What must be configured to enable Cisco Express Forwarding (CEF) on most Cisco devices that perform Layer 3 switching?
Answer
  • Manually configure next-hop Layer 2 addresses.
  • Issue the no shutdown command on routed ports.
  • CEF is enabled by default, so no configuration is necessary.
  • Manually map Layer 2 addresses to Layer 3 addresses to populate the forwarding information base (FIB).

Question 22

Question
What is the purpose of adjacency tables as used in Cisco Express Forwarding (CEF)?
Answer
  • to populate the forwarding information base (FIB)
  • to maintain Layer 2 next-hop addresses
  • to allow the separation of Layer 2 and Layer 3 decision making
  • to update the forwarding information base (FIB)

Question 23

Question
Which statement describes a characteristic of the network layer in the OSI model?
Answer
  • It manages the data transport between the processes running on each host.
  • In the encapsulation process, it adds source and destination port numbers to the IP header.
  • When a packet arrives at the destination host, its IP header is checked by the network layer to determine where the packet has to be routed.
  • Its protocols specify the packet structure and processing used to carry the data from one host to another.

Question 24

Question
A user gets an IP address of 192.168.0.1 from the company network administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?
Answer
  • Both users must be using the same Internet Service Provider.
  • ISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.
  • ISPs use Domain Name Service to change a user IP address into a public IP address that can be used on the Internet.
  • Both users must be on the same network.

Question 25

Question
Why does HTTP use TCP as the transport layer protocol?
Answer
  • to ensure the fastest possible download speed
  • because HTTP is a best-effort protocol
  • because transmission errors can be tolerated easily
  • because HTTP requires reliable delivery

Question 26

Question
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
Answer
  • 2001:DB8:0:AB00::1234
  • 2001:DB8:0:AB::1234
  • 2001:DB8::AB00::1234
  • 2001:DB8:0:AB:0:1234

Question 27

Question
What field content is used by ICMPv6 to determine that a packet has expired?
Answer
  • TTL field
  • CRC field
  • Hop Limit field
  • Time Exceeded field

Question 28

Question
Which firewall technique blocks incoming packets unless they are responses to internal requests?
Answer
  • port filtering
  • stateful packet inspection
  • URL filtering
  • application filtering

Question 29

Question
A network technician is investigating network connectivity from a PC to a remote host with the address 10.1.1.5. Which command issued on the PC will return to the technician the complete path to the remote host?
Answer
  • trace 10.1.1.5
  • traceroute 10.1.1.5
  • tracert 10.1.1.5
  • ping 10.1.1.5

Question 30

Question
To prevent faulty network devices from carrying dangerous voltage levels, equipment must be [blank_start]grounded[blank_end] correctly
Answer
  • grounded

Question 31

Question
What is a possible hazard that can be caused by network cables in a fire?
Answer
  • The cable insulation could be flammable.
  • Users could be exposed to excessive voltage.
  • Network cables could be exposed to water.
  • The network cable could explode.

Question 32

Question
What device is commonly used to verify a UTP cable?
Answer
  • a multimeter
  • an Optical Time Domain Reflectometer
  • a cable tester
  • an ohmmeter

Question 33

Question
What needs to be checked when testing a UTP network cable?
Answer
  • capacitance
  • wire map
  • inductance
  • flexibility

Question 34

Question
Which function is provided by TCP?
Answer
  • data encapsulation
  • detection of missing packets
  • communication session control
  • path determination for data packets

Question 35

Question
What does a router use to determine where to send data it receives from the network?
Answer
  • an ARP table
  • a routing table
  • the destination PC physical address
  • a switching table

Question 36

Question
Which router interface should be used for direct remote access to the router via a modem?
Answer
  • an inband router interface
  • a console port
  • a serial WAN interface
  • an AUX port

Question 37

Question
A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?
Answer
  • user executive mode
  • global configuration mode
  • any line configuration mode
  • privileged EXEC mode

Question 38

Question
Which three statements characterize the transport layer protocols? (Choose three.)
Answer
  • TCP and UDP port numbers are used by application layer protocols.
  • TCP uses port numbers to provide reliable transportation of IP packets.
  • UDP uses windowing and acknowledgments for reliable transfer of data.
  • TCP uses windowing and sequencing to provide reliable transfer of data.
  • TCP is a connection-oriented protocol. UDP is a connectionless protocol.

Question 39

Question
Refer to the exhibit. A TCP segment from a server has been captured by Wireshark, which is running on a host. What acknowledgement number will the host return for the TCP segment that has been received?
Image:
Ccna1 Final 2015 Apr 6 Q28 (image/jpeg)
Answer
  • 2
  • 21
  • 250
  • 306
  • 2921

Question 40

Question
Which statement is true about an interface that is configured with the IPv6 address command?
Answer
  • IPv6 traffic-forwarding is enabled on the interface.
  • A link-local IPv6 address is automatically configured on the interface.
  • A global unicast IPv6 address is dynamically configured on the interface.
  • Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address.

Question 41

Question
Refer to the exhibit. An administrator must send a message to everyone on the router A network. What is the broadcast address for network 172.16.16.0/22?
Image:
I271962v1n1 211100 (image/png)
Answer
  • 172.16.16.255
  • 172.16.20.255
  • 172.16.19.255
  • 172.16.23.255
  • 172.16.255.255

Question 42

Question
A network administrator is variably subnetting a given block of IPv4 addresses. Which combination of network addresses and prefix lengths will make the most efficient use of addresses when the need is for 2 subnets capable of supporting 10 hosts and 1 subnet that can support 6 hosts?
Answer
  • 10.1.1.128/28 10.1.1.144/28 10.1.1.160/29
  • 10.1.1.128/28 10.1.1.144/28 10.1.1.160/28
  • 10.1.1.128/28 10.1.1.140/28 10.1.1.158/26
  • 10.1.1.128/26 10.1.1.144/26 10.1.1.160/26
  • 10.1.1.128/26 10.1.1.140/26 10.1.1.158/28

Question 43

Question
How many additional bits should be borrowed from a /26 subnet mask in order to create subnets for WAN links that need only 2 useable addresses?
Answer
  • 2
  • 3
  • 4
  • 5
  • 6

Question 44

Question
Refer to the exhibit. The administrator configured the access to the console and the vty lines of a router. Which conclusion can be drawn from this configuration?
Image:
I245427v1n1 Item Gap Itn (image/png)
Answer
  • Unauthorized individuals can connect to the router via Telnet without entering a password.
  • Because the IOS includes the login command on the vty lines by default, access to the device via Telnet will require authentication.
  • Access to the vty lines will not be allowed via Telnet by anyone.
  • Because the login command was omitted, the password cisco command is not applied to the vty lines.

Question 45

Question
An administrator issued the service password-encryption command to apply encryption to the passwords configured for enable password, vty, and console lines. What will be the consequences if the administrator later issues the no service password-encryption command?
Answer
  • It will remove encryption from all passwords.
  • It will reverse only the vty and console password encryptions.
  • It will not reverse any encryption.
  • It will reverse only the enable password encryption.

Question 46

Question
After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
Answer
  • The new configuration will be stored in flash memory.
  • The new configuration will be loaded if the switch is restarted.
  • The current IOS file will be replaced with the newly configured file.
  • The configuration changes will be removed and the original configuration will be restored.

Question 47

Question
What are two features of ARP? (Choose two.)
Answer
  • If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.
  • An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.
  • When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.
  • If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
  • If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

Question 48

Question
A network administrator is enabling services on a newly installed server. Which two statements describe how services are used on a server? (Choose two.)
Answer
  • Data sent with a service that uses TCP is received in the order the data was sent.
  • A port is considered to be open when it has an active server application that is assigned to it.
  • An individual server can have two services that are assigned to the same port number.
  • An individual server cannot have multiple services running at the same time.
  • Server security can be improved by closing ports that are associated with unused services.

Question 49

Question
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
Answer
  • 234.17.10.9
  • 234.16.12.10
  • 236.17.12.6
  • 236.17.12.10

Question 50

Question
A particular telnet site does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
Answer
  • ipconfig /all
  • arp -a
  • ipconfig /displaydns
  • nslookup

Question 51

Question
Network devices come in two physical configurations. Devices that have expansion slots that provide the flexibility to add new modules have a [blank_start]Modular[blank_end] configuration.
Answer
  • Modular

Question 52

Question
Which statement is true about DHCP operation?
Answer
  • When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.
  • A client must wait for lease expiration before it sends another DHCPREOUEST message.
  • The DHCPDISCOVER message contains the IP address and sub net masK to be assigned, the IP address of the DNS server, and the IP address of the default gateway.
  • If the client receives several DHCPOFFER messages from different servers, it sends a unicast DHCPREOUEST message to the server from which it chooses to obtain the IP information.

Question 53

Question
Which type of wireless security is easily compromised?
Answer
  • EAP
  • PSK
  • WEP
  • WPA

Question 54

Question
A network administrator notices that the throughput on the network appears lower than expected when compared to the end-to-end network bandwidth. Which three factors can explain this difference? (Choose three.)
Answer
  • the amount of traffic
  • the type of data encapsulation in use
  • the type of traffic
  • the number and type of network devices that the data is crossing
  • the bandwidth of the connection to the ISP
  • the reliability of the network backbone

Question 55

Question
A host PC is attempting to lease an address through DHCP. What message is sent by the server to the client know it is able to use the provided IP information?
Answer
  • DHCPDISCOVER
  • DHCPOFFER
  • DHCPPREQUEST
  • DHCPACK
  • DHCPNACK

Question 56

Question
A network administrator is configuring access control to switch SW1. If the administrator uses console line to connect to the switch, which password is needed to access user EXEC mode?
Image:
Ccna1 Final 2015 Apr 6 Q2 (image/png)
Answer
  • letmein
  • secretin
  • lineconin
  • linevtyin

Question 57

Question
How many bits would need to be borrowed if a network admin were given the IP addressing scheme of 172.16.0.0/16 and needed no more than 16 subnet with equal number of hosts?
Answer
  • 10
  • 12
  • 2
  • 4
  • 8

Question 58

Question
Which statement best describes the operation of the File Transfer Protocol?
Answer
  • An FTP client uses a source port number of 21 and a randomly generated destination port number during the establishment of control traffic with an FTP Server.
  • An FTP client uses a source port number of 20 and a randomly generated destination port number during the establishment of data traffic with an FTP Server.
  • An FTP server uses a source port number of 20 and a randomly generated destination port number during the establishment of control traffic with an FTP client.
  • An FTP server uses a source port number of 21 and a randomly generated destination port number during the establishment of control traffic with an FTP client.

Question 59

Question
A client is establishing a TCP session with a server. How is the acknowledgment number in the response segment to the client determined?
Answer
  • The acknowledgment number field is modified by adding 1 to the randomly chosen initial sequence number in response to the client.
  • The acknowledgment number is set to 11 to signify an acknowledgment packet and synchronization packet back to the client.
  • The acknowledgment number field uses a random source port number in response to the client.
  • The acknowledgment number is set to 1 to signify an acknowledgment packet back to the client.

Question 60

Question
Why does layer 3 device perform the ANDing process on a destination IP and subnet Mask?
Answer
  • to identify host address and destination host;
  • to identify network address of destination host;
  • to identify faulty frames;
  • to identify broadcast address of destination network;

Question 61

Question
There was also a question about if you activated service password encryption in the past and you prompt “no service password encryption” what password are modified ?
Answer
  • no password at all;
  • password of the lines are in clear;
  • login password;
  • ?

Question 62

Question
What type of communication rule would best describe CSMA/CD?
Answer
  • message encapsulation
  • flow control
  • message encoding
  • access method

Question 63

Question
What is the primary reason to subnet IPv6 prefixes?
Answer
  • to conserve IPv6 addresses
  • to avoid wasting IPv6 addresses
  • to conserve IPv6 prefixes
  • to create a hierarchical Layer 3 network design

Question 64

Question
Which statement describes data throughput?
Answer
  • It is the measure of the bits transferred across the media under perfect conditions.
  • It is the measure of the bits transferred across the media over a given period of time.
  • It indicates the capacity of a particular medium to carry data.
  • It is the guaranteed data transfer rate offered by an ISP.

Question 65

Question
Pv4 multicast addresses are directly mapped to IEEE 802 (Ethernet) MAC addresses using the last [blank_start]4[blank_end] of the 28 available bits in the IPv4 multicast group address
Answer
  • 4

Question 66

Question
How could a faulty network device create a source of hazard for a user? (Choose two.)
Answer
  • It could stop functioning.
  • It could apply dangerous voltage to other pieces of equipment.
  • It could explode.
  • It could produce an unsafe electromagnetic field.
  • It could apply dangerous voltage to itself.

Question 67

Question
What is the metric value that is used to reach the 10.1.1.0 network in the following routing table entry? D 10.1.1.0/24 [90/2170112] via 209.165.200.226, 00:00:05, Serial0/0/0
Answer
  • 24
  • 90
  • 05
  • 2170112

Question 68

Question
What are three important considerations when planning the structure of an IP addressing scheme? (Choose three.)
Answer
  • preventing duplication of addresses
  • providing and controlling access
  • documenting the network
  • monitoring security and performance
  • conserving addresses
  • implementing new services

Question 69

Question
Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
Answer
  • VoIP
  • DNS
  • HTTP
  • FTP
  • POP3

Question 70

Question
What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?
Answer
  • It sends a DHCPREQUEST that identifies which lease offer the client is accepting.
  • It sends a DHCPNAK and begins the DHCP process over again.
  • It discards both offers and sends a new DHCPDISCOVER.
  • It accepts both DHCPOFFER messages and sends a DHCPACK.

Question 71

Question
To what legacy address class does the address 10.0.0.0 belong?
Answer
  • Class B
  • Class D
  • Class A
  • Class C
  • Class E

Question 72

Question
How many IPv4 addresses are available to be assigned to hosts on a network that has a mask of 255.255.255.248?
Answer
  • 16
  • 14
  • 8
  • 254
  • 6
  • 2

Question 73

Question
What type of communication medium is used with a wireless LAN connection?
Answer
  • radio waves
  • fiber
  • microwave
  • UTP

Question 74

Question
Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
Answer
  • EUI-64
  • static
  • SLAAC
  • stateful DHCPv6

Question 75

Question
What is a characteristic of DNS?
Answer
  • DNS servers can cache recent queries to reduce DNS query traffic.
  • DNS servers are programmed to drop requests for name translations that are not within their zone.
  • All DNS servers must maintain mappings for the entire DNS structure.
  • DNS relies on a hub-and-spoke topology with centralized servers.

Question 76

Question
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
Answer
  • 2001:DB8:BC15
  • 2001:DB8:BC15:A
  • 2001:DB8:BC15:A:1
  • 2001:DB8:BC15:A:12

Question 77

Question
What information is maintained in the CEF adjacency table?
Answer
  • Layer 2 next hops
  • MAC address to IPv4 address mappings
  • IP address to interface mappings
  • the IP addresses of all neighboring routers

Question 78

Question
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
Answer
  • terminal monitor
  • logging console
  • logging buffered
  • logging synchronous

Question 79

Question
Which protocol requires the establishment of a session between sender and receiver hosts prior to transmitting data?
Answer
  • UDP
  • TCP
  • IP
  • ICMP

Question 80

Question
What does a client do when it has UDP datagrams to send?
Answer
  • It sends to the server a segment with the SYN flag set to synchronize the conversation.
  • It just sends the datagrams.
  • It queries the server to see if it is ready to receive data.
  • It sends a simplified three-way handshake to the server.

Question 81

Question
Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
Answer
  • TCP
  • IP
  • UDP
  • POP
  • DNS
  • Ethernet

Question 82

Question
What is a characteristic of multicast messages?
Answer
  • They are sent to all hosts on a network.
  • They must be acknowledged.
  • They are sent to a select group of hosts.
  • They are sent to a single destination.

Question 83

Question
Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?
Answer
  • FTP
  • HTTP
  • DNS
  • SMTP

Question 84

Question
In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?
Answer
  • master-slave
  • client-based
  • peer-to-peer
  • point-to-point
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