Module 15: Application Layer
What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?
.com
How many connections are required by FTP between client and server?
2
What ports are used by FTP?
20 client 21 control
Which of the following DNS record types is used to resolve IPv4 addresses?
A
Which of the following DNS record types is used to resolve IPv6 addresses?
AAAA
This layer of the OSI model is concerned with the protocols that exchange data between programs running on hosts.
Application Layer
These three OSI layers define the same functions as the TCP/IP model application layer.
Application Layer Presentation Layer Session Layer
Which peer-to-peer application allows users to share pieces of many files with each other at the same time?
BitTorrent
A wireless host needs to request an IPv4 address. What protocol would be used to process the request?
DHCP
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
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
True or false? HTTP is a secure protocol.
False
True or false? Resource sharing over SMB is only supported on Microsoft operating systems.
False
True or false? The peer-to-peer networking model requires the implementation of a dedicated server for data access.
False
This message type is used when a client requests for data from an HTTP client.
GET
This protocol is used by a web browser to establish a connection to a web server.
HTTP
Which protocol uses encryption?
HTTPS
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?
IMAP
Which is a feature of IMAP?
It downloads a copy of email messages leaving the original on the server
Which of the following DNS record types is used to resolve a mail exchange record?
MX
Which of the following DNS record types is used to resolve a name server?
NS
This message type is used when uploading data files to a web server.
POST
This message type is used when uploads resources or content to web server, such as an image.
PUT
MKV, GIF, and JPG standards are associated with which OSI layer?
Presentation Layer
Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?
SMB
This protocol is used by a client to send email to a mail server.
SMTP
Which statement is true about FTP?
The client can download data from or upload data to the server.
Which of the following is displayed by the nslookup utility?
The configured default DNS server.
True or false? FTP data transfers take place from client to server (push) and from server to client (pull).
True
True or false? In a peer-to-peer network environment every peer can function as both a client and a server.
True
Which of the following is a feature of the Gnutella protocol?
Users can share whole files with other users
On a home network, which device is most likely to provide dynamic IPv4 addressing to clients on the home network?
an ISP DHCP server
Which TCP/IP model layer is closest to the end user?
application
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?
client
What are two characteristics of the application layer of the TCP/IP model?
closest to the end user the creation and maintenance of dialogue between source and destination applications
What two tasks can be performed by a local DNS server?
forwarding name resolution requests between servers mapping name-to-IP addresses for internal hosts
Why is DHCP for IPv4 preferred for use on large networks?
it is a more efficient way to manage IPv4 addresses than static address assignment.
