Computer Networks MCQ

What does IP stand for in networking?

What is the purpose of the OSI model?

What layer of the OSI model does IP operate at?

What is a MAC address?

What does DNS stand for?

What is the purpose of DHCP?

What is a router?

What is a switch?

What is TCP and how does it differ from UDP?

What is an IP address?

What is the difference between IPv4 and IPv6?

What is NAT (Network Address Translation)?

What is a firewall?

What is a VPN?

What is HTTP?

What is HTTPS and why is it important?

What is a subnet mask?

What does FTP stand for and what is it used for?

What is the loopback address in networking?

What is the default port number for HTTP?

What is a LAN?

What is a WAN?

What is ping used for?

What is the purpose of the ARP protocol?

What is a broadcast address?

What is SSH?

What is SMTP used for?

What is the purpose of ICMP?

What is bandwidth in networking?

What is a proxy server?

What is a port number in networking?

What is traceroute used for?

What is the difference between TCP and UDP connection setup?

What is Ethernet?

What is Wi-Fi?

What does SSL/TLS do?

What is a hub and how does it differ from a switch?

What is a collision domain?

What is BGP?

What is the purpose of a default gateway?

What is OSPF and what algorithm does it use to compute routes?

What is the TCP 3-way handshake and why is it necessary?

What is TCP slow start?

What is the difference between stateful and stateless firewalls?

What is VLAN (Virtual LAN)?

What is the difference between distance vector and link-state routing?

What is QoS (Quality of Service)?

What is the difference between TCP Reno and TCP CUBIC?

What is a CDN (Content Delivery Network)?

What is the difference between TCP half-close and full-close?

What is MPLS (Multi-Protocol Label Switching)?

What is network address translation and what problems does it create?

What is the CAP theorem in distributed systems?

What is QUIC and why was it developed?

What is SDN (Software-Defined Networking)?

What is the difference between routing and forwarding?

What is HTTP/2 and how does it improve on HTTP/1.1?

What is a three-tier network architecture?

What is BGP route hijacking?

What is a TCP window and flow control?

What is anycast and how is it used?

What is the difference between EIGRP and OSPF?

What is the purpose of spanning tree protocol (STP)?

What is DNS caching and TTL?

What is network slicing in 5G?

What is the difference between circuit switching and packet switching?

What is a socket in networking?

What is DNSSEC?

What is load balancing and what algorithms are used?

How do you calculate the number of usable hosts in a subnet given a CIDR prefix?

What problem does the count-to-infinity issue cause in distance-vector routing, and how is it mitigated?

What is the purpose of the TTL (Time to Live) field in an IP header?

How does Path MTU Discovery work and why does it matter?

What is the difference between a recursive and an iterative DNS query?

What is the function of a Layer 3 switch, and how does it differ from a traditional router?

How does Address Resolution Protocol (ARP) spoofing/poisoning work as an attack?

What is the purpose of TCP keepalive, and what is a typical default behavior?

How does a wireless access point handle the "hidden node problem"?

What is the difference between a forward proxy and a reverse proxy in terms of which side they serve?

Why do troubleshooting guides recommend checking the subnet mask and default gateway first when a host can reach local devices but not the internet?

What is TCP's Fast Retransmit mechanism?

What is TCP BBR (Bottleneck Bandwidth and Round-trip propagation time)?

What is ECMP (Equal-Cost Multi-Path) routing?

What is BGP community and how is it used for traffic engineering?

What is PCE (Path Computation Element) in MPLS/SR networks?

What is kernel bypass networking and how does io_uring relate?

What is Segment Routing (SR) and how does it differ from MPLS?

What is P4 (Programming Protocol-independent Packet Processors)?

What is BGP RPKI (Resource Public Key Infrastructure)?

What is Wi-Fi 6E and what does the 6 GHz band offer?

What is the difference between TCP SACK and selective retransmission?

What is network virtualization using VXLAN?

What is the difference between proactive and reactive routing in mobile ad hoc networks?

What is the role of ISP peering vs transit in internet routing?

What is the TCP Nagle algorithm and when should it be disabled?

What is HTTP/3 and how does it use QUIC?

What is network function virtualization (NFV)?

What is network time protocol (NTP) and why is time synchronization critical?

How does Active Queue Management (AQM) such as CoDel address bufferbloat?

In a leaf-spine data center fabric, why is ECMP combined with consistent hashing important for flow distribution?