Interactive quiz

Networks and protocols

Each attempt draws 15 questions from a bank of 100 questions about networks and protocols.

15 randomly selected questions Pass mark: 60%

Instructions

Answer all 15 questions and submit the form: each correct answer is worth one point.

What distinguishes a stateful firewall from a simple stateless filter?

Choose one answer

It works only with UDP packets It tracks connection state It physically changes network cables It automatically resolves every DNS name

Which list contains all and only the private IPv4 blocks defined by RFC 1918?

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100.64.0.0/10, 169.254.0.0/16, and 224.0.0.0/4 127.0.0.0/8, 192.168.0.0/16, and 240.0.0.0/4 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 10.0.0.0/8, 172.32.0.0/12, and 192.0.0.0/8

How many bits does an IPv4 address contain?

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32 bits 128 bits 64 bits 16 bits

What is the fundamental purpose of a VPN?

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Remove the need to authenticate users Physically increase Wi-Fi signal power Replace every IP address with a MAC address Create a protected tunnel across an untrusted network

Which transport protocol provides reliable, ordered delivery?

Choose one answer

ARP UDP TCP IP

What distinguishes a dynamic route from a static route?

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It is learned through a routing protocol It is always faster on the wire It necessarily uses IPv6 addresses It does not appear in the routing table

How does PAT allow many private hosts to share one public IPv4 address?

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By assigning the same MAC to every host By using different port numbers for translations By creating a DNS domain for each packet By disabling TCP and UDP

Which rule applies to “::” compression within a single IPv6 address?

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It is allowed only in multicast addresses It may appear only once It always replaces exactly one group It may appear an unlimited number of times

What does a router do to the TTL field of an IPv4 packet it forwards?

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It replaces it with the TCP port It decrements it and discards the packet if it reaches zero It always leaves it unchanged It doubles it

Which application protocol is mainly used to send and transfer email messages?

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SMTP IMAP NTP SNMP

How many usable host addresses does an IPv4 /26 subnet normally contain?

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30 126 62 64

What does the MSS value advertised during a TCP connection indicate?

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The largest TCP payload receivable in one segment The maximum number of routers that may be crossed The maximum duration of the connection The maximum size of the entire Ethernet frame

During encapsulation, what is the correct order of data units when moving down from the application layer?

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Data → packet → segment → bits Frame → packet → segment → data Data → frame → segment → packet Data → segment → packet → frame

Which pair correctly maps DNS records to IP address versions?

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MX → IPv4; PTR → IPv6 A → IPv4; AAAA → IPv6 CNAME → IPv4; TXT → IPv6 A → IPv6; AAAA → IPv4

Which prefix identifies IPv6 link-local addresses?

Choose one answer

FC00::/7 FF00::/8 2000::/3 FE80::/10

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Submit your 15 answers to receive your score and review.