Data Communication & Networks MCQs

Network Basics

• IETF standards documents are referred to as RFC (Request for Comments).
• As data packets move from upper to lower layers in the hierarchy, headers are added.
• The structure or format of data in communication is known as syntax.
• Keyboard communication with a computer involves simplex transmission.
• The first networking framework developed was ARPANET.
• A medium is defined as the physical path over which a message travels.
• The FCC (Federal Communications Commission) oversees interstate and international commerce in communications.
• A switch is not categorized as a network edge device; edge devices include PCs, smartphones, and servers.
• Protocols are the established rules that govern data communication.
• A multipoint connection consists of three or more devices sharing a link.

Network Communications

• A distributed system makes various computers appear as a single coherent system to its client.
• Two devices are considered part of a network if one device can exchange information with a process on another device.
• An overlay network is a network built on top of another existing network.
• In a computer network, nodes can be entities that originate, route, or terminate data.
• A broadcast network is one where the communication channel is shared among all machines.
• Bluetooth exemplifies a personal area network (PAN).
• Routers are devices that forward packets between networks by processing routing information.
• A protocol stack is a list of protocols utilized by a system, with each protocol designated for a specific layer.

Network Management and Access

• Network congestion can occur when traffic overloads the channel.
• A virtual private network (VPN) extends a private network across public networks.

Access Network Technologies

• A low-speed downstream channel is not a component of residential telephone lines.
• DSL (Digital Subscriber Line) telcos typically provide both wired phone access and ISP services.
• DSLAM (Digital Subscriber Line Access Multiplexer) converts analog signals to digital.
• A cable modem termination system (CMTS) is not a term associated with DSL.
• Hybrid Fiber-Coaxial (HFC) networks comprise both fiber and coaxial cables.
• Cable internet access includes characteristics such as being a shared broadcast medium and using HFC technologies.
• Among optical-distribution architectures that function as switched Ethernet, PON (Passive Optical Network) is significant.