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Application Layer (Layer 7) – MCQs

1.
Which OSI layer provides network services directly to applications?
Application Layer
Presentation Layer
Transport Layer
Session Layer
The Application Layer interfaces directly with end-user applications.
2.
Which PDU is used by the Application Layer?
Data
Segment
Packet
Frame
Application Layer exchanges data directly as its PDU.
3.
Which devices may operate at the Application Layer?
Gateway
Hub
Switch
Repeater
Gateways can function at higher layers including the Application Layer.
4.
Which of the following is an Application Layer protocol for email sending?
SMTP
FTP
DNS
DHCP
SMTP is used to send emails at the Application Layer.
5.
Which Application Layer protocol is used for secure web browsing?
HTTPS
FTP
Telnet
SNMP
HTTPS provides secure web browsing at the Application Layer.
6.
Which Application Layer protocol is used to retrieve emails from a server?
POP3
SMTP
FTP
HTTP
POP3 is used to receive emails from a mail server.
7.
Which protocol is used for transferring files at the Application Layer?
FTP
SMTP
DHCP
NTP
FTP allows file transfer services between client and server.
8.
Which function is NOT performed by the Application Layer?
Routing packets between networks
Providing interface for applications
Remote access
Resource sharing
Routing is handled by the Network Layer, not the Application Layer.
9.
Which protocol provides secure HTTP services?
HTTPS
TELNET
SNMP
POP3
HTTPS encrypts web traffic, ensuring secure communication.
10.
Which Application Layer protocol allows email access on multiple devices without downloading?
IMAP
POP3
SMTP
FTP
IMAP synchronizes emails across devices, keeping them on the server.

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