Unit - 1 (Computer Networks)

Which is not the end device in computer networks?

• Servers
• Tablets

• Routers
• Printer

Example of Half Duplex

• Walkie-talkie

• Radio

• Mobile Phone

• TV

Which topology connects all devices with each other directly

• Bus

• Star

• Mesh

• Hybrid

Expansion of OSI Reference Model

• Open Style Interconnection

• Open Systems Interconnection

• Open Systems Intrusion

• Old Systems Interconnection

Give the layer sequence in OSI Reference Model

• Physical Layer, Data Layer, Network Layer, Transport Layer, Presentation Layer
• Data Layer, Network Layer, Transport Layer, Presentation Layer, Application Layer
• Data Link Layer, Network Layer, Transport Layer, Presentation Layer, Application Layer
• Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, Application Layer

Data is transmitted in the form of ______ in physical layer in OSI Model

• bits

• characters
• packets
• bytes

________ works in Data Link Layer

• Hub

• Router

• Switches

• Repeater

Data is transmitted in the form of _______ in transport layer

• packets
• segments
• bits
• frames

Protocols that works in application layer of OSI Model

• HTTP, FTP, SMTP, SNMP
• DNS
• TCP

• Frame Relay

The application layer in TCP/IP model is the combination of _________ layers in OSI Model

• Physical, Data Link, and Network
• Transport, Network, and Data Link
• Session, Presentation, and Application
• Network, Data Link, and Physical