Module 14-15 Exam Flashcards by Voyager Unknown

Which transport layer feature is used
to guarantee session establishment?
* UDP ACK flag
* TCP 3-way handshake
* UDP sequence number
* TCP port number

TCP 3-way handshake

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Which action is performed by a client
when establishing communication
with a server via the use of UDP at the
transport layer?
* The client sets the window size for
the session.
* The client sends an ISN to the
server to start the 3-way
handshake.
* The client randomly selects a
source port number.
* The client sends a synchronization
segment to begin the session.

The client randomly selects a
source port number.

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What is the complete range of TCP
and UDP well-known ports?
* 0 to 255
* 0 to 1023
* 256 – 1023
* 1024 – 49151

0 to 1023

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What is a socket?
* the combination of the source and
destination IP address and source
and destination Ethernet address
* the combination of a source IP
address and port number or a
destination IP address and port
number
* the combination of the source and
destination sequence and
acknowledgment numbers
* the combination of the source and
destination sequence numbers
and port numbers

the combination of a source IP
address and port number or a
destination IP address and port
number

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A 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?
* 1 segment
* 10 segments
* 100 segments
* 1000 segments

10 segments

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Which factor determines TCP window
size?
* the amount of data to be
transmitted
* the number of services included in
the TCP segment
* the amount of data the destination
can process at one time
* the amount of data the source is
capable of sending at one time

the amount of data the destination
can process at one time

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What does a client do when it has UDP
datagrams to send?
* 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.
* It sends to the server a segment
with the SYN flag set to
synchronize the conversation.

It just sends the datagrams.

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Which three fields are used in a UDP
segment header? (Choose three.)
* Window Size
* Length
* Source Port
* Acknowledgment Number
* Checksum
* Sequence Number

Length
Source Port
Checksum

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What are two roles of the transport
layer in data communication on a
network? (Choose two.)
* identifying the proper application
for each communication stream
* tracking the individual
communication between
applications on the source and
destination hosts
* providing frame delimiting to
identify bits making up a frame
* performing a cyclic redundancy
check on the frame for errors
* providing the interface between
applications and the underlying
network over which messages are
transmitted

identifying the proper application
for each communication stream
tracking the individual
communication between
applications on the source and
destination hosts

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What information is used by TCP to
reassemble and reorder received
segments?
* port numbers
* sequence numbers
* acknowledgment numbers
* fragment numbers

sequence numbers

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What important information is added
to the TCP/IP transport layer header to
ensure communication and
connectivity with a remote network
device?
* timing and synchronization
* destination and source port
numbers
* destination and source physical
addresses
* destination and source logical
network addresses

destination and source port
numbers

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Which two characteristics are
associated with UDP sessions?
(Choose two.)
* Destination devices receive traffic
with minimal delay.
* Transmitted data segments are
tracked.
* Destination devices reassemble
messages and pass them to an
application.
* Received data is unacknowledged.
* Unacknowledged data packets are
retransmitted.

Destination devices receive traffic
with minimal delay.
Received data is unacknowledged.

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Which flag in the TCP header is used
in response to a received FIN in order
to terminate connectivity between two
network devices?
* FIN
* ACK
* SYN
* RST

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

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What is a characteristic of UDP?
* UDP datagrams take the same
path and arrive in the correct order
at the destination.
* Applications that use UDP are
always considered unreliable.
* UDP reassembles the received
datagrams in the order they were
received.
* UDP only passes data to the
network when the destination is
ready to receive the data.

UDP reassembles the received
datagrams in the order they were
received.

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.What kind of port must be requested
from IANA in order to be used with a
specific application?
* registered port
* private port
* dynamic port
* source port

registered port

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Which three application layer
protocols use TCP? (Choose three.)
* SMTP
* FTP
* SNMP
* HTTP
* TFTP
* DHCP

SMTP
FTP
HTTP

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Which three statements characterize
UDP? (Choose three.)
* UDP provides basic
connectionless transport layer
functions.
* UDP provides connectionoriented, fast transport of data at
Layer 3.
* UDP relies on application layer
protocols for error detection.
* UDP is a low overhead protocol
that does not provide sequencing
or flow control mechanisms.
* UDP relies on IP for error detection
and recovery.
* UDP provides sophisticated flow
control mechanisms.

UDP provides basic
connectionless transport layer
functions.
UDP relies on application layer
protocols for error detection.
UDP is a low overhead protocol
that does not provide sequencing
or flow control mechanisms.

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Which two fields are included in the
TCP header but not in the UDP
header? (Choose two.)
* window
* checksum
* source port
* destination port
* sequence number

window
sequence number

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Which field in the TCP header
indicates the status of the three-way
handshake process?
* window
* reserved
* checksum
* control bits

control bits

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Why does HTTP use TCP as the
transport layer protocol?
* 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

because HTTP requires reliable
delivery

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Which two types of applications are
best suited for UDP? (Choose two.)
* applications that need data flow
control
* applications that require reliable
delivery
* applications that handle reliability
themselves
* applications that need the
reordering of segments
* applications that can tolerate
some data loss, but require little or
no delay

applications that handle reliability
themselves
applications that can tolerate
some data loss, but require little or
no delay

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How are port numbers used in the
TCP/IP encapsulation process?
* Source port numbers and
destination port numbers are not
necessary when UDP is the
transport layer protocol being used
for the communication.
* Source port and destination port
numbers are randomly generated.
* If multiple conversations occur
that are using the same service,
the source port number is used to
track the separate conversations.
* Destination port numbers are
assigned automatically and
cannot be changed.

If multiple conversations occur
that are using the same service,
the source port number is used to
track the separate conversations.

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. In what two situations would UDP be
better than TCP as the preferred
transport protocol? (Choose two.)
* when applications need to
guarantee that a packet arrives
intact, in sequence, and
unduplicated
* when a faster delivery mechanism
is needed
* when delivery overhead is not an
issue
* when applications do not need to
guarantee delivery of the data
* when destination port numbers
are dynamic

when a faster delivery mechanism
is needed
when applications do not need to
guarantee delivery of the data

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What are three responsibilities of the transport layer? (Choose three.) * meeting the reliability requirements of applications, if any * multiplexing multiple communication streams from many users or applications on the same network * identifying the applications and services on the client and server that should handle transmitted data * directing packets towards the destination network * formatting data into a compatible form for receipt by the destination devices * conducting error detection of the contents in frames

* meeting the reliability requirements of applications, if any * multiplexing multiple communication streams from many users or applications on the same network * identifying the applications and services on the client and server that should handle transmitted data

6.Which three statements describe a DHCP Discover message? (Choose three.) * The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF). * The destination IP address is 255.255.255.255. * The message comes from a server offering an IP address. * The message comes from a client seeking an IP address. * All hosts receive the message, but only a DHCP server replies. * Only the DHCP server receives the message.

* The destination IP address is 255.255.255.255 * The message comes from a client seeking an IP address. * All hosts receive the message, but only a DHCP server replies.

.Which two protocols may devices use in the application process that sends email? (Choose two.) * HTTP * SMTP * POP * IMAP * DNS * POP3

* SMTP * DNS

What is true about the Server Message Block protocol? * Different SMB message types have a different format. * Clients establish a long term connection to servers. * SMB messages cannot authenticate a session. * SMB uses the FTP protocol for communication.

* Clients establish a long term connection to servers.

What is the function of the HTTP GET message? * to request an HTML page from a web server * to send error information from a web server to a web client * to upload content to a web server from a web client * to retrieve client email from an email server using TCP port 110

* to request an HTML page from a web server

.Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted? * application * presentation * session * transport

* application

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher? * peer-to-peer * master-slave * client/server * point-to-point

* client/server

What do the client/server and peer-topeer network models have in common? * Both models have dedicated servers. * Both models support devices in server and client roles. * Both models require the use of TCP/IP-based protocols. * Both models are used only in the wired network environment.

* Both models support devices in server and client roles.

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

* peer-to-peer

What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza? * Ethernet * Gnutella * POP * SMTP

* Gnutella

What is a key characteristic of the peer-to-peer networking model? * wireless networking * social networking without the Internet * network printing using a print server * resource sharing without a dedicated server

* resource sharing without a dedicated server

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.) * physical * session * network * presentation * data link * transport * application

* session * presentation * application

What is an example of network communication that uses the clientserver model? * A user uses eMule to download a file that is shared by a friend after the file location is determined. * A workstation initiates an ARP to find the MAC address of a receiving host. * A user prints a document by using a printer that is attached to a workstation of a coworker. * A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

* A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data? * internetwork * session * presentation * application * network access

* application

.What is an advantage of SMB over FTP? * Only with SMB can data transfers occur in both directions. * Only SMB establishes two simultaneous connections with the client, making the data transfer faster. * SMB is more reliable than FTP because SMB uses TCP and FTP uses UDP. * SMB clients can establish a longterm connection to the server.

* SMB clients can establish a longterm connection to the server.

. A manufacturing company subscribes to certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.) * FTP * HTTP * DNS * SNMP * DHCP * SMTP

* FTP * HTTP * SMTP

Which application layer protocol uses message types such as GET, PUT, and POST? * DNS * DHCP * SMTP * HTTP * POP3

* HTTP

.What type of information is contained in a DNS MX record? * the FQDN of the alias used to identify a service * the IP address for an FQDN entry * the domain name mapped to mail exchange servers * the IP address of an authoritative name server

* the domain name mapped to mail exchange servers

Which three protocols operate at the application layer of the TCP/IP model? (Choose three.) * ARP * TCP * UDP * FTP * POP3 * DHCP

* FTP * POP3 * DHCP

Which protocol is used by a client to communicate securely with a web server? * SMTP * SMB * IMAP * HTTPS

* HTTPS

Which applications or services allow hosts to act as client and server at the same time? * client/server applications * email applications * P2P applications * authentication services

* P2P applications

What are two characteristics of peerto-peer networks? (Choose two.) * scalability * one way data flow * decentralized resources * centralized user accounts * resource sharing without a dedicated server

* decentralized resources * resource sharing without a dedicated server

Which scenario describes a function provided by the transport layer? * A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network. * A student is playing a short webbased movie with sound. The movie and sound are encoded within the transport layer header. * A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window. * A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.

* A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.) * physical layer * session layer * transport layer * application layer * presentation layer * data link layer

* session layer * application layer * presentation layer

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received two packets of data from the PC? * 3001 * 6001 * 4500 * 6000

* 3001

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received three packets of data from the PC? * 4501 * 6001 * 6000 * 4500

* 4501

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received four packets of data from the PC? * 6001 * 3001 * 1501 * 1500

* 6001

. A client creates a packet to send to a server. The client is requesting TFTP service. What number will be used as the destination port number in the sending packet? * 69 * 67 * 53 * 80

* 69

A client creates a packet to send to a server. The client is requesting FTP service. What number will be used as the destination port number in the sending packet? * 21 * 69 * 67 * 80

* 21

A client creates a packet to send to a server. The client is requesting SSH service. What number will be used as the destination port number in the sending packet? * 22 * 69 * 67 * 80

* 22

A client creates a packet to send to a server. The client is requesting HTTP service. What number will be used as the destination port number in the sending packet? * 80 * 67 * 53 * 69

* 80

A client creates a packet to send to a server. The client is requesting POP3 service. What number will be used as the destination port number in the sending packet? * 110 * 67 * 53 * 69 * 443 * 161 * 80

* 110

A client creates a packet to send to a server. The client is requesting telnet service. What number will be used as the destination port number in the sending packet? * 23 * 443 * 161 * 110

* 23

A client creates a packet to send to a server. The client is requesting SNMP service. What number will be used as the destination port number in the sending packet? * 161 * 443 * 110 * 80

* 161

A client creates a packet to send to a server. The client is requesting HTTPS service. What number will be used as the destination port number in the sending packet? * 443 * 161 * 110 * 80

* 443

A client creates a packet to send to a server. The client is requesting SMTP service. What number will be used as the destination port number in the sending packet? * 25 * 443 * 161 * 110

* 25

Module 14-15 Exam Flashcards

(60 cards)