14-15
Which two protocols may devices use in the application process that sends email? (Choose two.) HTTP SMTP IMAP DNS
HTTP SMTP DNS
Which protocol is used by a client to communicate securely with a web server? IMAP HTTPS
HTTPS
What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza? Ethernet Gnutella
Gnutella
Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication? FTP DNS
DNS
Which field in the TCP header indicates the status of the three-way handshake process? checksum control bits
control bits
What are two characteristics of peer-to-peer networks? (Choose two.) decentralized resources centralized user accounts resource sharing without a dedicated server
decentralized resources resource sharing without a dedicated server
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 port numbers
Which application layer protocol uses message types such as GET, PUT, and POST? DNS HTTP
HTTP
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
10 segments
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
110
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
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
22
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
23
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
25
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
3001
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
443
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
4501
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
69
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
80
Which scenario describes a function provided by the transport layer? A student is playing a short web-based 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 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.
What is an example of network communication that uses the client-server model? 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 flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices? FIN ACK
ACK
Which two characteristics are associated with UDP sessions? (Choose two.) Destination devices receive traffic with minimal delay. Transmitted data segments are tracked. Received data is unacknowledged.
Destination devices receive traffic with minimal delay. Received data is unacknowledged.
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. 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
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 just sends the datagrams.
Which three fields are used in a UDP segment header? (Choose three.) Window Size Length Source Port Acknowledgment Number Checksum
Length Source Port Checksum
Which applications or services allow hosts to act as client and server at the same time? client/server applications P2P applications
P2P applications
What is an advantage of SMB over FTP? SMB is more reliable than FTP because SMB uses TCP and FTP uses UDP. SMB clients can establish a long-term connection to the server
SMB clients can establish a long-term connection to the server.
Which three statements describe a DHCP Discover message? (Choose three.) 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.
The message comes from a client seeking an IP address. All hosts receive the message, but only a DHCP server replies. The destination IP address is 255.255.255.255.
Which three statements characterize UDP? (Choose three.) UDP provides basic connectionless transport layer functions. UDP provides connection-oriented, 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 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.
What is a characteristic of UDP? 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
Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted? application presentation
application
Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data? application network access
application
The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.) physical session presentation application
application presentation session
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. session layer transport layer application layer presentation layer
application layer presentation layer session layer
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
identifying the proper application for each communication stream tracking the individual communication between applications on the source and destination hosts
In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used? peer-to-peer client-based
peer-to-peer
What kind of port must be requested from IANA in order to be used with a specific application? registered port private port
registered port
What is a key characteristic of the peer-to-peer networking model? wireless networking resource sharing without a dedicated server
resource sharing without a dedicated server
Which two fields are included in the TCP header but not in the UDP header? (Choose two.) window checksum sequence number
sequence number window
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 request an HTML page from a web server
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
161
Which three protocols operate at the application layer of the TCP/IP model? (Choose three.) UDP FTP POP3 DHCP
FTP POP3 DHCP
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 delivery overhead is not an issue when applications do not need to guarantee delivery of the data
when a faster delivery mechanism is needed when applications do not need to guarantee delivery of the data
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
6001
What do the client/server and peer-to-peer network models have in common? Both models have dedicated servers. Both models support devices in server and client roles.
Both models support devices in server and client roles.
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
SMTP FTP HTTP
Which three application layer protocols use TCP? (Choose three.) SMTP FTP SNMP HTTP
SMTP FTP HTTP
Which two types of applications are best suited for UDP? (Choose two.) 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
Why does HTTP use TCP as the transport layer protocol? because transmission errors can be tolerated easily because HTTP requires reliable delivery
because HTTP requires reliable delivery
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
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
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.
Clients establish a long term connection to servers.
Which networking model is being used when an author uploads one chapter document to a file server of a book publisher? master-slave client/server
client/server
What information is used by TCP to reassemble and reorder received segments? sequence numbers acknowledgment numbers
sequence numbers
Which factor determines TCP window size? 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
What type of information is contained in a DNS MX record? the FQDN of the alias used to identify a service the domain name mapped to mail exchange servers
the domain name mapped to mail exchange servers
