Test
Final Exam quiz 2
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (84)
1Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
- Aarea A
- Barea B
- Carea C
- Darea D
2Three 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?
- Aaudio conference, financial transactions, web page
- Bfinancial transactions, web page, audio conference
- Caudio conference, web page, financial transactions
- Dfinancial transactions, audio conference, web page
3During normal operation, from which location do most Cisco switches and routers run the IOS?
- ARAM
- Bflash
- CNVRAM
- Ddisk drive
4A 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?
- AThe configuration will be copied to flash.
- BThe configuration will load when the router is restarted.
- CThe new configuration file will replace the IOS file.
- DThe changes will be lost when the router restarts.
5What information does the loopback test provide?
- AThe TCP/IP stack on the device is working correctly.
- BThe device has end-to-end connectivity.
- CDHCP is working correctly.
- DThe Ethernet cable is working correctly.
- EThe device has the correct IP address on the network.
6What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?
- AThe switch places the new CRC value in the FCS field and forwards the frame.
- BThe switch notifies the source of the bad frame.
- CThe switch drops the frame.
- DThe switch floods the frame to all ports except the port through which the frame arrived to notify the hosts of the error.
7Which destination address is used in an ARP request frame?
- A0.0.0.0
- B255.255.255.255
- CFFFF.FFFF.FFFF
- D127.0.0.1
- E01-00-5E-00-AA-23
8What is the auto-MDIX feature on a switch?
- Athe automatic configuration of an interface for 10/100/1000 Mb/s operation
- Bthe automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection
- Cthe automatic configuration of full-duplex operation over a single Ethernet copper or optical cable
- Dthe ability to turn a switch interface on or off accordingly if an active connection is detected
9What are the two main components of Cisco Express Forwarding (CEF)? (Choose two.)
- Aadjacency tables
- BMAC-address tables
- Crouting tables
- DARP tables
- Eforwarding information base (FIB)
10Which 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?
- AIt receives the packet and forwards it directly to the destination host.
- BIt de-encapsulates the packet, selects the appropriate path, and encapsulates the packet to forward it toward the destination host
- CIt de-encapsulates the packet and forwards it toward the destination host.
- DIt selects the path and forwards it toward the destination host.
11Refer 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??
- AThe directly connected networks have to be created manually to be displayed in the routing table.
- BThe routing table will only display information about these networks when the router receives a packet.
- CThe no shutdown command was not issued on these interfaces.
- DThe gateway of last resort was not configured.
12What happens when part of an Internet television transmission is not delivered to the destination?
- AA delivery failure message is sent to the source host.
- BThe part of the television transmission that was lost is re-sent.
- CThe entire transmission is re-sent.
- DThe transmission continues without the missing portion.
13Which three statements characterize the transport layer protocols? (Choose three.)
- ATCP and UDP port numbers are used by application layer protocols.
- BTCP uses port numbers to provide reliable transportation of IP packets.
- CUDP uses windowing and acknowledgments for reliable transfer of data.
- DTCP uses windowing and sequencing to provide reliable transfer of data.
- ETCP is a connection-oriented protocol. UDP is a connectionless protocol.
14Which statement is true regarding the UDP client process during a session with a server?
- ADatagrams that arrive in a different order than that in which they were sent are not placed in order.
- BA session must be established before datagrams can be exchanged.
- CA three-way handshake takes place before the transmission of data begins.
- DApplication servers have to use port numbers above 1024 in order to be UDP capable.
15Which two components are configured via software in order for a PC to participate in a network environment? (Choose two.)
- AMAC address
- BIP address
- Ckernel
- Dshell
- Esubnet mask
16Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
- AIt eliminates most address configuration errors.
- Bit ensures that addresses are only applied to devices that require a permanent address.
- CIt guarantees that every device that needs an address will get one.
- DIt provides an address only to devices that are authorized to be connected to the network.
- EIt reduces the burden on network support staff.
17What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
- A2001:DB8:BC15::0
- B2001:DB8:BC15:A::0
- C2001:DB8:BC15:A:1::1
- D2001:DB8:BC15:A:12::0
18What is the purpose of the network security authentication function?
- Ato require users to prove who they are
- Bto determine which resources a user can access
- Cto keep track of the actions of a user
- Dto provide challenge and response questions
19Which type of wireless security makes use of dynamic encryption keys each time a client associates with an AP?
- AEAP
- BPSK
- CWEP
- DWPA
20Which field in an IPv4 packet header will typically stay the same during its transmission?
- APacket Length
- BDestination Address
- CFlag
- DTime-to-Live
21What must be configured to enable Cisco Express Forwarding (CEF) on most Cisco devices that perform Layer 3 switching?
- AManually configure next-hop Layer 2 addresses.
- BIssue the no shutdown command on routed ports.
- CCEF is enabled by default, so no configuration is necessary.
- DManually map Layer 2 addresses to Layer 3 addresses to populate the forwarding information base (FIB).
22What is the purpose of adjacency tables as used in Cisco Express Forwarding (CEF)?
- Ato populate the forwarding information base (FIB)
- Bto maintain Layer 2 next-hop addresses
- Cto allow the separation of Layer 2 and Layer 3 decision making
- Dto update the forwarding information base (FIB)
23Which statement describes a characteristic of the network layer in the OSI model?
- AIt manages the data transport between the processes running on each host.
- BIn the encapsulation process, it adds source and destination port numbers to the IP header.
- CWhen 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.
- DIts protocols specify the packet structure and processing used to carry the data from one host to another.
24A 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?
- ABoth users must be using the same Internet Service Provider.
- BISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.
- CISPs use Domain Name Service to change a user IP address into a public IP address that can be used on the Internet.
- DBoth users must be on the same network.
25Why does HTTP use TCP as the transport layer protocol?
- Ato ensure the fastest possible download speed
- Bbecause HTTP is a best-effort protocol
- Cbecause transmission errors can be tolerated easily
- Dbecause HTTP requires reliable delivery
26What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
- A2001:DB8:0:AB00::1234
- B2001:DB8:0:AB::1234
- C2001:DB8::AB00::1234
- D2001:DB8:0:AB:0:1234
27What field content is used by ICMPv6 to determine that a packet has expired?
- ATTL field
- BCRC field
- CHop Limit field
- DTime Exceeded field
28Which firewall technique blocks incoming packets unless they are responses to internal requests?
- Aport filtering
- Bstateful packet inspection
- CURL filtering
- Dapplication filtering
29A 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?
- Atrace 10.1.1.5
- Btraceroute 10.1.1.5
- Ctracert 10.1.1.5
- Dping 10.1.1.5
30To prevent faulty network devices from carrying dangerous voltage levels, equipment must be [blank_start]grounded[blank_end] correctly
- Agrounded
31What is a possible hazard that can be caused by network cables in a fire?
- AThe cable insulation could be flammable.
- BUsers could be exposed to excessive voltage.
- CNetwork cables could be exposed to water.
- DThe network cable could explode.
32What device is commonly used to verify a UTP cable?
- Aa multimeter
- Ban Optical Time Domain Reflectometer
- Ca cable tester
- Dan ohmmeter
33What needs to be checked when testing a UTP network cable?
- Acapacitance
- Bwire map
- Cinductance
- Dflexibility
34Which function is provided by TCP?
- Adata encapsulation
- Bdetection of missing packets
- Ccommunication session control
- Dpath determination for data packets
35What does a router use to determine where to send data it receives from the network?
- Aan ARP table
- Ba routing table
- Cthe destination PC physical address
- Da switching table
36Which router interface should be used for direct remote access to the router via a modem?
- Aan inband router interface
- Ba console port
- Ca serial WAN interface
- Dan AUX port
37A 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?
- Auser executive mode
- Bglobal configuration mode
- Cany line configuration mode
- Dprivileged EXEC mode
38Which three statements characterize the transport layer protocols? (Choose three.)
- ATCP and UDP port numbers are used by application layer protocols.
- BTCP uses port numbers to provide reliable transportation of IP packets.
- CUDP uses windowing and acknowledgments for reliable transfer of data.
- DTCP uses windowing and sequencing to provide reliable transfer of data.
- ETCP is a connection-oriented protocol. UDP is a connectionless protocol.
39Refer 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?
- A2
- B21
- C250
- D306
- E2921
40Which statement is true about an interface that is configured with the IPv6 address command?
- AIPv6 traffic-forwarding is enabled on the interface.
- BA link-local IPv6 address is automatically configured on the interface.
- CA global unicast IPv6 address is dynamically configured on the interface.
- DAny IPv4 addresses that are assigned to the interface are replaced with an IPv6 address.
41Refer 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?
- A172.16.16.255
- B172.16.20.255
- C172.16.19.255
- D172.16.23.255
- E172.16.255.255
42A 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?
- A10.1.1.128/28
10.1.1.144/28
10.1.1.160/29 - B10.1.1.128/28
10.1.1.144/28
10.1.1.160/28 - C10.1.1.128/28
10.1.1.140/28
10.1.1.158/26 - D10.1.1.128/26
10.1.1.144/26
10.1.1.160/26 - E10.1.1.128/26
10.1.1.140/26
10.1.1.158/28
- A10.1.1.128/28
43How 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?
- A2
- B3
- C4
- D5
- E6
44Refer 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?
- AUnauthorized individuals can connect to the router via Telnet without entering a password.
- BBecause the IOS includes the login command on the vty lines by default, access to the device via Telnet will require authentication.
- CAccess to the vty lines will not be allowed via Telnet by anyone.
- DBecause the login command was omitted, the password cisco command is not applied to the vty lines.
45An 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?
- AIt will remove encryption from all passwords.
- BIt will reverse only the vty and console password encryptions.
- CIt will not reverse any encryption.
- DIt will reverse only the enable password encryption.
46After 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?
- AThe new configuration will be stored in flash memory.
- BThe new configuration will be loaded if the switch is restarted.
- CThe current IOS file will be replaced with the newly configured file.
- DThe configuration changes will be removed and the original configuration will be restored.
47What are two features of ARP? (Choose two.)
- AIf 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.
- BAn 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.
- CWhen 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.
- DIf no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.
- EIf a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
48A network administrator is enabling services on a newly installed server. Which two statements describe how services are used on a server? (Choose two.)
- AData sent with a service that uses TCP is received in the order the data was sent.
- BA port is considered to be open when it has an active server application that is assigned to it.
- CAn individual server can have two services that are assigned to the same port number.
- DAn individual server cannot have multiple services running at the same time.
- EServer security can be improved by closing ports that are associated with unused services.
49Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
- A234.17.10.9
- B234.16.12.10
- C236.17.12.6
- D236.17.12.10
50A 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?
- Aipconfig /all
- Barp -a
- Cipconfig /displaydns
- Dnslookup
51Network 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.
- AModular
52Which statement is true about DHCP operation?
- AWhen a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.
- BA client must wait for lease expiration before it sends another DHCPREOUEST message.
- CThe 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.
- DIf 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.
53Which type of wireless security is easily compromised?
- AEAP
- BPSK
- CWEP
- DWPA
54A 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.)
- Athe amount of traffic
- Bthe type of data encapsulation in use
- Cthe type of traffic
- Dthe number and type of network devices that the data is crossing
- Ethe bandwidth of the connection to the ISP
- Fthe reliability of the network backbone
55A 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?
- ADHCPDISCOVER
- BDHCPOFFER
- CDHCPPREQUEST
- DDHCPACK
- EDHCPNACK
56A 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?
- Aletmein
- Bsecretin
- Clineconin
- Dlinevtyin
57How 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?
- A10
- B12
- C2
- D4
- E8
58Which statement best describes the operation of the File Transfer Protocol?
- AAn 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.
- BAn 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.
- CAn 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.
- DAn 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.
59A client is establishing a TCP session with a server. How is the acknowledgment number in the response segment to the client determined?
- AThe acknowledgment number field is modified by adding 1 to the randomly chosen initial sequence number in response to the client.
- BThe acknowledgment number is set to 11 to signify an acknowledgment packet and synchronization packet back to the client.
- CThe acknowledgment number field uses a random source port number in response to the client.
- DThe acknowledgment number is set to 1 to signify an acknowledgment packet back to the client.
60Why does layer 3 device perform the ANDing process on a destination IP and subnet Mask?
- Ato identify host address and destination host;
- Bto identify network address of destination host;
- Cto identify faulty frames;
- Dto identify broadcast address of destination network;
61There 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 ?
- Ano password at all;
- Bpassword of the lines are in clear;
- Clogin password;
- D?
62What type of communication rule would best describe CSMA/CD?
- Amessage encapsulation
- Bflow control
- Cmessage encoding
- Daccess method
63What is the primary reason to subnet IPv6 prefixes?
- Ato conserve IPv6 addresses
- Bto avoid wasting IPv6 addresses
- Cto conserve IPv6 prefixes
- Dto create a hierarchical Layer 3 network design
64Which statement describes data throughput?
- AIt is the measure of the bits transferred across the media under perfect conditions.
- BIt is the measure of the bits transferred across the media over a given period of time.
- CIt indicates the capacity of a particular medium to carry data.
- DIt is the guaranteed data transfer rate offered by an ISP.
65Pv4 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
- A4
66How could a faulty network device create a source of hazard for a user? (Choose two.)
- AIt could stop functioning.
- BIt could apply dangerous voltage to other pieces of equipment.
- CIt could explode.
- DIt could produce an unsafe electromagnetic field.
- EIt could apply dangerous voltage to itself.
67What 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
- A24
- B90
- C05
- D2170112
68What are three important considerations when planning the structure of an IP addressing scheme? (Choose three.)
- Apreventing duplication of addresses
- Bproviding and controlling access
- Cdocumenting the network
- Dmonitoring security and performance
- Econserving addresses
- Fimplementing new services
69Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
- AVoIP
- BDNS
- CHTTP
- DFTP
- EPOP3
70What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?
- AIt sends a DHCPREQUEST that identifies which lease offer the client is accepting.
- BIt sends a DHCPNAK and begins the DHCP process over again.
- CIt discards both offers and sends a new DHCPDISCOVER.
- DIt accepts both DHCPOFFER messages and sends a DHCPACK.
71To what legacy address class does the address 10.0.0.0 belong?
- AClass B
- BClass D
- CClass A
- DClass C
- EClass E
72How many IPv4 addresses are available to be assigned to hosts on a network that has a mask of 255.255.255.248?
- A16
- B14
- C8
- D254
- E6
- F2
73What type of communication medium is used with a wireless LAN connection?
- Aradio waves
- Bfiber
- Cmicrowave
- DUTP
74Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
- AEUI-64
- Bstatic
- CSLAAC
- Dstateful DHCPv6
75What is a characteristic of DNS?
- ADNS servers can cache recent queries to reduce DNS query traffic.
- BDNS servers are programmed to drop requests for name translations that are not within their zone.
- CAll DNS servers must maintain mappings for the entire DNS structure.
- DDNS relies on a hub-and-spoke topology with centralized servers.
76What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
- A2001:DB8:BC15
- B2001:DB8:BC15:A
- C2001:DB8:BC15:A:1
- D2001:DB8:BC15:A:12
77What information is maintained in the CEF adjacency table?
- ALayer 2 next hops
- BMAC address to IPv4 address mappings
- CIP address to interface mappings
- Dthe IP addresses of all neighboring routers
78Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
- Aterminal monitor
- Blogging console
- Clogging buffered
- Dlogging synchronous
79Which protocol requires the establishment of a session between sender and receiver hosts prior to transmitting data?
- AUDP
- BTCP
- CIP
- DICMP
80What does a client do when it has UDP datagrams to send?
- AIt sends to the server a segment with the SYN flag set to synchronize the conversation.
- BIt just sends the datagrams.
- CIt queries the server to see if it is ready to receive data.
- DIt sends a simplified three-way handshake to the server.
81Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
- ATCP
- BIP
- CUDP
- DPOP
- EDNS
- FEthernet
82What is a characteristic of multicast messages?
- AThey are sent to all hosts on a network.
- BThey must be acknowledged.
- CThey are sent to a select group of hosts.
- DThey are sent to a single destination.
83Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?
- AFTP
- BHTTP
- CDNS
- DSMTP
84In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?
- Amaster-slave
- Bclient-based
- Cpeer-to-peer
- Dpoint-to-point
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- Computer Science Test sobre Final Exam quiz 2, creado por Gigel Gigel el 26/01/2020.
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- Gigel Gigel
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