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

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

destination and source port numbers

destination and source physical addresses

destination and source logical network addresses

Which two characteristics are associated with UDP sessions? (Choose two.)

Destination devices receive traffic with minimal delay.

Received data is unacknowledged.

Transmitted data segments are tracked.

Destination devices reassemble messages and pass them to an application.

Unacknowledged data packets are retransmitted.

What is a characteristic of UDP?

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

UDP datagrams take the same path and arrive in the correct order at the destination.

Applications that use UDP are always considered unreliable.

UDP only passes data to the network when the destination is ready to receive the data.

Which three statements characterize UDP? (Choose three.)

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.

UDP provides connection-oriented, fast transport of data at Layer 3.

UDP relies on IP for error detection and recovery.

Why does HTTP use TCP as the transport layer protocol?

because HTTP requires reliable delivery

to ensure the fastest possible download speed

because HTTP is a best-effort protocol

because transmission errors can be tolerated easily

Which two types of applications are best suited for UDP? (Choose two.)

applications that handle reliability themselves

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

applications that need data flow control

applications that require reliable delivery

applications that need the reordering of segments

How are port numbers used in the TCP/IP encapsulation process?

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

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.

Destination port numbers are assigned automatically and cannot be changed.

In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two.)

when a faster delivery mechanism is needed

when applications do not need to guarantee delivery of the data

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated

when delivery overhead is not an issue

when destination port numbers are dynamic

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

Which three statements describe a DHCP Discover message? (Choose three.)

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.

The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).

The message comes from a server offering an IP address.

What is true about the Server Message Block protocol?

Clients establish a long term connection to servers.

Different SMB message types have a different format.

SMB messages cannot authenticate a session.

SMB uses the FTP protocol for communication.

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

What do the client/server and peer-to-peer network models have in common?

Both models support devices in server and client roles.

Both models have dedicated servers.

Both models require the use of TCP/IP-based protocols.

Both models are used only in the wired network environment.

What is a key characteristic of the peer-to-peer networking model?

resource sharing without a dedicated server

social networking without the Internet

network printing using a print server

What is an example of network communication that uses the client-server model?

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

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.

What is an advantage of SMB over FTP?

SMB clients can establish a long-term connection to the server.

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.

What type of information is contained in a DNS MX record?

the domain name mapped to mail exchange servers

the FQDN of the alias used to identify a service

the IP address for an FQDN entry

the IP address of an authoritative name server

What are two characteristics of peer-to-peer networks? (Choose two.)

resource sharing without a dedicated server

Which scenario describes a function provided by the transport layer?

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 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 web-based movie with sound. The movie and sound are encoded within the transport layer header.

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.

CFall14-15

Quiz

•

Computers

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University

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Practice Problem

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Hard

David Berryman

Used 1+ times

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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.

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What is the complete range of TCP and UDP well-known ports?

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