Network Fundamentals MCQs - Page 19

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Topic Notes: Network Fundamentals

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Preparation Guide & Key Focus Areas for Network Fundamentals MCQs

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181

In a Content Delivery Network (CDN), what is 'Edge Computing'?

A Computing that happens only at the central data center. B Running applications and processing data closer to the end-user at the network periphery. C A method for cooling servers located at the edge of a rack. D Connecting the edges of different autonomous systems together.

182

In wireless networking (802.11), what does the 'NAV' (Network Allocation Vector) represent?

A A physical sensor that detects signal strength. B A virtual carrier sensing mechanism that tracks the remaining time the medium will be busy. C A unique identifier for the Access Point. D The frequency range currently in use by the transmitter.

183

What is the function of 'Gratuitous ARP'?

A To request the MAC address of a remote server. B To update the ARP tables of other hosts when a host's IP or MAC address changes. C To map a MAC address back to an IP address (Reverse ARP). D To verify the identity of a gateway using digital signatures.

184

In the context of TCP Congestion Control, what is the specific purpose of the 'Fast Recovery' algorithm?

A To bypass the Slow Start phase after a timeout occurs. B To prevent the congestion window from dropping to 1 MSS after receiving three duplicate ACKs. C To increase the congestion window exponentially until it reaches the ssthresh value. D To ensure that the receiver's buffer does not overflow during high-speed data transfers.

185

What is the purpose of the 'Pseudo-header' used in TCP and UDP checksum calculations?

A To ensure the packet reaches the correct hardware interface. B To protect against misrouted packets by including IP addresses and protocol information in the checksum. C To provide a backup header in case the main header is corrupted. D To encrypt the payload during transmission.

186

Which field in the IPv4 header is used to prevent packets from looping infinitely?

187

What is 'Traffic Shaping'?

A Increasing the physical bandwidth of a link during peak hours. B Delaying some packets to bring them into compliance with a desired traffic profile. C Changing the physical route of a fiber optic cable. D Compressing images to reduce web page load times.

188

What is 'Jitter' in network communications?

A The total time delay of a packet from source to destination. B The variation in packet arrival times (latency variance). C The percentage of packets that fail to reach the destination. D The noise level on a copper cable.

189

Which layer of the OSI model does the 'TLS' (Transport Layer Security) protocol typically operate in, even though it's often used by applications?

190

What is 'NAT Traversal' and why is it necessary?

A A technique to bypass firewalls for illegal access. B Methods for establishing connections between hosts behind different NAT devices (e.g., in P2P). C A way to convert IPv6 addresses into IPv4 addresses. D A routing protocol for underwater sensor networks.

Network Fundamentals MCQs for Competitive Exams

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