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Perguntas do quiz (44)
1Which two characteristics are associated with UDP sessions? (Choose two.)
- AReceived data is unacknowledged.
- BUnacknowledged data packets are retransmitted.
- CDestination devices reassemble messages and pass them to an application.
- DTransmitted data segments are tracked.
- EDestination devices receive traffic with minimal delay.
2What happens if part of an FTP message is not delivered to the destination?
- AThe message is lost because FTP does not use a reliable delivery method.
- BThe FTP source host sends a query to the destination host.
- CThe part of the FTP message that was lost is re-sent.
- DThe entire FTP message is re-sent.
3A host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth?
- Awindow size
- Bmultiplexing
- Cport numbers
- Dacknowledgments
4What kind of port must be requested from IANA in order to be used with a specific application?
- Aregistered port
- Bprivate port
- Cdynamic port
- Dsource port
5What is a socket?
- Athe combination of the source and destination IP address and source and destination Ethernet address
- Bthe combination of a source IP address and port number or a destination IP address and port number
- Cthe combination of the source and destination sequence and acknowledgment numbers
- Dthe combination of the source and destination sequence numbers and port numbers
6What is the complete range of TCP and UDP well-known ports?
- A0 to 255
- B0 to 1023
- C256 – 1023
- D1024 – 49151
7Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?
- AFIN
- BACK
- CSYN
- DRST
8What type of information is included in the transport header?
- Adestination and source logical addresses
- Bdestination and source physical addresses
- Cdestination and source port numbers
- Dencoded application data
9What is a characteristic of a TCP server process?
- AEvery application process running on the server has to be configured to use a dynamic port number.
- BThere can be many ports open simultaneously on a server, one for each active server application.
- CAn individual server can have two services assigned to the same port number within the same transport layer services.
- DA host running two different applications can have both configured to use the same server port.
10Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)
- AACK
- BFIN
- CPSH
- DRST
- ESYN
- FURG
11A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?
- A1 segment
- B10 segments
- C100 segments
- D1000 segments
12Which factor determines TCP window size?
- Athe amount of data to be transmitted
- Bthe number of services included in the TCP segment
- Cthe amount of data the destination can process at one time
- Dthe amount of data the source is capable of sending at one time
13During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?
- Athe total number of bytes that have been received
- Bone number more than the sequence number
- Cthe next byte that the destination expects to receive
- Dthe last sequence number that was sent by the source
14What information is used by TCP to reassemble and reorder received segments?
- Aport numbers
- Bsequence numbers
- Cacknowledgment numbers
- Dfragment numbers
15What does TCP do if the sending source detects network congestion on the path to the destination?
- AThe source host will send a request for more frequent acknowledgments to the destination.
- BThe source will decrease the amount of data that it sends before it must receive acknowledgements from the destination
- CThe destination will request retransmission of the entire message.
- DThe source will acknowledge the last segment that is sent and include a request for a smaller window size in the message.
16What is a characteristic of UDP?
- AUDP datagrams take the same path and arrive in the correct order at the destination.
- BApplications that use UDP are always considered unreliable.
- CUDP reassembles the received datagrams in the order they were received.
- DUDP only passes data to the network when the destination is ready to receive the data.
17What does a client do when it has UDP datagrams to send?
- AIt just sends the datagrams.
- BIt queries the server to see if it is ready to receive data.
- CIt sends a simplified three-way handshake to the server.
- DIt sends to the server a segment with the SYN flag set to synchronize the conversation.
18What happens if the first packet of a TFTP transfer is lost?
- AThe TFTP application will retry the request if a reply is not received.
- BThe next-hop router or the default gateway will provide a reply with an error code.
- CThe client will wait indefinitely for the reply.
- DThe transport layer will retry the query if a reply is not received.
19A host device is receiving live streaming video. How does the device account for video data that is lost during transmission?
- AThe device will immediately request a retransmission of the missing data.
- BThe device will use sequence numbers to pause the video stream until the correct data arrives.
- CThe device will delay the streaming video until the entire video stream is received.
- DThe device will continue receiving the streaming video, but there may be a momentary disruption.
20Why 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
21When is UDP preferred to TCP?
- Awhen a client sends a segment to a server
- Bwhen all the data must be fully received before any part of it is considered useful
- Cwhen an application can tolerate some loss of data during transmission
- Dwhen segments must arrive in a very specific sequence to be processed successfully
22Which three application layer protocols use TCP? (Choose three.)
- ASMTP
- BFTP
- CSNMP
- DHTTP
- ETFTP
- FDHCP
23 Refer to the exhibit. How many broadcast domains are there?
- A1
- B2
- C3
- D4
24 How many usable host addresses are there in the subnet 192.168.1.32/27?
- A32
- B30
- C64
- D16
- E62
25How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
- A510
- B512
- C1022
- D1024
- E2046
- F2048
26A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many host addresses will this subnet provide??
- A4
- B6
- C8
- D10
- E12
27Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?
- A255.255.255.0
- B255.255.255.128
- C255.255.255.192
- D255.255.255.224
- E255.255.255.240
28Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?
- AIP address: 192.168.10.65 subnet mask: 255.255.255.240, default gateway: 192.168.10.76
- BIP address: 192.168.10.38 subnet mask: 255.255.255.240, default gateway: 192.168.10.33
- CIP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33
- DIP address: 192.168.10.41 subnet mask: 255.255.255.248, default gateway: 192.168.10.46
- EIP address: 192.168.10.254 subnet mask: 255.255.255.0, default gateway: 192.168.10.1
2929. How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?
- Atwo
- Bthree
- Cfour
- Dfive
30A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
- A192.168.1.16/28
- B192.168.1.64/27
- C192.168.1.128/27
- D192.168.1.96/28
- E192.168.1.192/28
31In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?
- A/23
- B/24
- C/25
- D/26
32Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many total host addresses are unused in the assigned subnets?
- A56
- B60
- C64
- D68
- E72
33 When developing an IP addressing scheme for an enterprise network, which devices are recommended to be grouped into their own subnet or logical addressing group?
- Aend-user clients
- Bworkstation clients
- Cmobile and laptop hosts
- Dhosts accessible from the Internet
34 A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
- Arandom static addresses to improve security
- Baddresses from different subnets for redundancy
- Cpredictable static IP addresses for easier identification
- Ddynamic addresses to reduce the probability of duplicate addresses
3535. Which 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.
36Refer to the exhibit. A computer that is configured with the IPv6 address as shown in the exhibit is unable to access the internet. What is the problem?
- AThe DNS address is wrong.
- BThere should not be an alternative DNS address.
- CThe gateway address is in the wrong subnet.
- DThe settings were not validated.
37 When subnetting a /64 IPv6 network prefix, which is the preferred new prefix length?
- A/66
- B/70
- C/72
- D/74
38 What 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
39Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
- A/62
- B/64
- C/66
- D/68
- E/70
40In dotted decimal notation, the IP address [blank_start]172.25.0.126[blank_end] is the last host address for the network 172.25.0.64/26.
- A172.25.0.126
41 Fill in the blank.
In dotted decimal notation, the subnet mask [blank_start]255.255.254.0[blank_end] will accommodate 500 hosts per subnet.
Consider the following range of addresses:
2001:0DB8:BC15:00A0:0000::
2001:0DB8:BC15:00A1:0000::
2001:0DB8:BC15:00A2:0000::
…
2001:0DB8:BC15:00AF:0000::
The prefix-length for the range of addresses is [blank_start]/60[blank_end]- A255.255.254.0
- B/60
42A nibble consists of [blank_start]4[blank_end] bits.
- A4
43Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many addresses are wasted in total by subnetting each network with a subnet mask of 255.255.255.224?
- A56
- B60
- C64
- D68
- E72
44Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.)
destination IP address -> [blank_start]192.168.2.2[blank_end]
destination port number -> [blank_start]80[blank_end]
source IP address -> [blank_start]192.168.1.2[blank_end]
source port number -> [blank_start]2578[blank_end]
- A192.168.2.2
- B80
- C192.168.1.2
- D2578
Informações
- Descrição
- Quiz sobre Sem título, criado por Daniel Wygoda em 24-03-2017.
- Autor
- Daniel Wygoda
- Idioma
- English
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