Internet
A(n) ____ is composed of several computers connected together to share resources and data.
  • Hyperlink
  • Network
  • Internet
Explanation: A network is a system of interconnected computers that share resources, data, and services. It enables communication between devices, whether in a local area (LAN) or across broader regions (WAN).
Layer 1 of the OSI model is
  • Link layer
  • Transport layer
  • Network layer
  • Physical layer
Explanation: Layer 1 of the OSI (Open Systems Interconnection) model is the Physical layer. It is responsible for the transmission and reception of raw data bits over a physical medium, such as cables or radio waves.
End-to-end connectivity is provided from host-to-host in
  • Data link layer
  • Network layer
  • Transport layer
  • Session layer
Explanation: The Transport layer (Layer 4) of the OSI model provides end-to-end connectivity and ensures reliable data transfer between host-to-host, managing error detection, flow control, and data segmentation.
A datum that indicates some important state in the content of input or output is
  • Sibling
  • SIO
  • Sequence
  • Sentinel
Explanation: A sentinel is a special value used in data processing to indicate a specific condition or boundary, such as the end of a data stream or a significant change in input or output content.
Which of the following transport layer protocols is used to support electronic mail?
  • IP
  • UDP
  • SMTP
  • TCP
Explanation: TCP (Transmission Control Protocol) is used to support electronic mail because it ensures reliable, connection-oriented communication. SMTP (Simple Mail Transfer Protocol), which handles email transmission, operates over TCP to ensure secure and accurate delivery of emails.
Layer 1 of the OSI model is
  • Link layer
  • Transport layer
  • Network layer
  • Physical layer
Explanation: Layer 1 of the OSI model is the Physical layer, responsible for the transmission and reception of raw data bits over a physical medium like cables or wireless signals. It defines the hardware elements involved in data transfer.
Unix was developed by
  • Berkley software group
  • Bell labs
    • Explanation: Unix was developed in the late 1960s and early 1970s by Ken Thompson, Dennis Ritchie, and others at Bell Labs (a research and development subsidiary of AT&T).