Chapter 15 - Application Layer Flashcards
Which layer of the OSI model is concerned with the protocols that exchange data between programs running on hosts?
Application layer
MKV, GIF, and JPG standards are associated with which OSI layer?
Presentation
These three OSI layers define the same functions as the TCP/IP model application layer.
Application, presentation, session
Which two are protocols that belong in the OSI application layer?
DNS, SMTP
This is a function of the OSI session layer.
Exchange of information to initiate dialog between peers.
rue or false? The peer-to-peer networking model requires the implementation of a dedicated server for data access.
False
True or false? In a peer-to-peer network environment every peer can function as both a client and a server.
True
Which peer-to-peer application allows users to share pieces of many files with each other at the same time?
BitTorrent
Which of the following is a feature of the Gnutella protocol?
Users can share whole files with other users.
HTTP is a request/response protocol. When a client, typically a web browser, sends a request to a web server, HTTP specifies the message types used for that communication. The three common message types are GET (see figure), POST, and PUT:
GET - This is a client request for data. A client (web browser) sends the GET message to the web server to request HTML pages.
POST - This uploads data files to the web server, such as form data.
PUT - This uploads resources or content to the web server, such as an image.
Which message type is used when uploading data files to a web server?
POST
Which protocol is used by a web browser to establish a connection to a web server.
HTTP
Which protocol is used by a client to send email to a mail server?
SMTP
Which is a feature of IMAP?
It downloads a copy of email messages leaving the original on the server.
True or false? HTTP is a secure protocol.
False
What are some of the DNS server record types?
A - An end device IPv4 address
NS - An authoritative name server
AAAA - An end device IPv6 address (pronounced quad-A)
MX - A mail exchange record
Which of the following DNS record types is used to resolve IPv6 addresses?
AAAA
True or false? A DNS server that receives a request for a name resolution that is not within its DNS zone will send a failure message to the requesting client.
False
Which of the following is displayed by the nslookup utility?
The configured default DNS server
Which of the following DNS resource record types resolves authoritative name servers?
NS
How many connections are required by FTP between client and server?
2
True or false? FTP data transfers take place from client to server (push) and from server to client (pull).
True
Which of these ports are used by FTP? (Choose two.)
20 & 21.
True or false? Resource sharing over SMB is only supported on Microsoft operating systems.
False
On a home network, which device is most likely to provide dynamic IPv4 addressing to clients on the home network?
an ISP DHCP server
a DNS server
a home router
a dedicated file server
a home router
What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?
.com
index
www
http
.com
What are two characteristics of the application layer of the TCP/IP model? (Choose two.)
responsibility for logical addressing
responsibility for physical addressing
closest to the end user
the creation and maintenance of dialogue between source and destination applications
closest to the end user
source and destination applications
What message type is used by an HTTP client to request data from a web server?
GET *
PUT
ACK
POST
GET
Which protocol can be used to transfer messages from an email server to an email client?
SMTP
POP3
SNMP
HTTP
POP3
Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?
SMB (Server Message Block)
Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.)
GIF
IP
UDP
HTTP
TCP
MPEG
GIF, HTTP & MPEG
Why is DHCP for IPv4 preferred for use on large networks?
It prevents sharing of files that are copyrighted.
It is a more efficient way to manage IPv4 addresses than static address assignment is.
Large networks send more requests for domain to IP address resolution than do smaller networks.
Hosts on large networks require more IPv4 addressing configuration settings than do hosts on small networks.
DHCP uses a reliable transport layer protocol.
It is a more efficient way to manage IPv4 addresses than static address assignment is.
An author is uploading one chapter document from a personal computer to a file server of a book publisher. What role is the personal computer assuming in this network model?
master
slave
server
client
transient
Client
Which statement is true about FTP?
The client can choose if FTP is going to establish one or two connections with the server.
FTP does not provide reliability during data transmission.
The client can download data from or upload data to the server.
FTP is a peer-to-peer application.
The client can download data from or upload data to the server.
A wireless host needs to request an IPv4 address. What protocol would be used to process the request?
SNMP
HTTP
DHCP
ICMP
FTP
DHCP
Which TCP/IP model layer is closest to the end user?
internet
transport
network access
application
Application
When retrieving email messages, which protocol allows for easy, centralized storage and backup of emails that would be desirable for a small- to medium-sized business?
HTTPS
IMAP
SMTP
POP
IMAP
Which protocol uses encryption?
DHCP
DNS
HTTPS
FTP
HTTPS
Which two tasks can be performed by a local DNS server? (Choose two.)
retrieving email messages
providing IP addresses to local hosts
allowing data transfer between two network devices
forwarding name resolution requests between servers
mapping name-to-IP addresses for internal hosts
forwarding name resolution requests between servers
mapping name-to-IP addresses for internal hosts
