Advanced Networking MCQs Quiz

Questions40

Timer40:00

Answered0

Score0

What This Quiz Covers

This advanced quiz covers OSI, TCP/IP, CIDR, subnetting, network IP, broadcast IP, private ranges, localhost, ports, DNS, ARP, ICMP, routing, NAT, firewall, load balancer, Linux commands, AWS VPC, Docker networking, Kubernetes Services, and real troubleshooting logic.

Result

Question 1

Advanced

A DevOps engineer can ping 8.8.8.8 but cannot open google.com. Which layer/component is most likely failing?

DNS name resolution Default gateway Physical cable TCP three-way handshake

Question 2

Advanced

In the OSI model, which layer is mainly responsible for logical addressing and routing between networks?

Data Link layer Network layer Transport layer Application layer

Question 3

Advanced

Which statement best describes CIDR?

A protocol used only for DNS lookup A classless way to represent network prefix length, such as /24 A firewall rule format used only in Linux A physical cable standard

Question 4

Advanced

For the subnet 192.168.10.0/24, what is the broadcast address?

192.168.10.0 192.168.10.1 192.168.10.254 192.168.10.255

Question 5

Advanced

For 192.168.10.0/24, which address is the network address?

192.168.10.0 192.168.10.1 192.168.10.254 192.168.10.255

Question 6

Advanced

Which private IP range belongs to the old Class A private range?

10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 127.0.0.0/8

Question 7

Advanced

Which private IP range is commonly known as the Class C private range?

10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 169.254.0.0/16

Question 8

Advanced

What is 127.0.0.1 mainly used for?

Broadcasting to all hosts Testing the local machine through loopback Reaching the default gateway Assigning a public IP

Question 9

Advanced

Which protocol maps an IP address to a MAC address inside a local network?

DNS ARP DHCP HTTP

Question 10

Advanced

Which protocol is normally used by ping?

TCP UDP ICMP FTP

Question 11

Advanced

Which command is best for checking your Linux routing table using modern Linux tools?

ip route ip addr dig route ss -r

Question 12

Advanced

Which command shows listening TCP/UDP ports on Linux?

ss -tuln ip addr show dig -x hostname -I

Question 13

Advanced

A website uses HTTPS. Which default TCP port is normally used?

22 53 80 443

Question 14

Advanced

HTTP normally uses which default port?

21 22 80 3306

Question 15

Advanced

SSH normally uses which port?

20 21 22 25

Question 16

Advanced

DNS commonly uses which port?

53 67 80 443

Question 17

Advanced

Which command is commonly used to query DNS records from the command line?

dig example.com ip link example.com arp example.com curl -r example.com

Question 18

Advanced

What is the main purpose of a default gateway?

It stores domain names locally It forwards traffic from the local network to other networks It encrypts HTTP traffic It converts TCP into UDP

Question 19

Advanced

Which device/function distributes client traffic across multiple backend servers?

Load balancer ARP cache Subnet mask Loopback adapter

Question 20

Advanced

What is the main purpose of NAT?

Translate private IP addresses to public IP addresses and back Resolve domain names into IP addresses Encrypt data at the application layer Detect open ports only

Question 21

Advanced

Which protocol provides reliable, connection-oriented communication?

TCP UDP ICMP ARP

Question 22

Advanced

Which protocol is faster and connectionless but does not guarantee delivery?

TCP UDP SSH TLS

Question 23

Advanced

Which command can trace the path packets take to a remote host?

traceroute example.com ip addr add example.com ss example.com arp -s example.com

Question 24

Advanced

In Docker networking, what is usually the default network type for containers on a single host?

Bridge Host-only public BGP MPLS Token ring

Question 25

Advanced

In Kubernetes, which object provides a stable virtual IP/DNS name for a group of Pods?

Service ConfigMap Secret Namespace

Question 26

Advanced

In AWS networking, what is a VPC?

A virtual private cloud network where you launch cloud resources A Linux command for checking ports A DNS record type only A TCP congestion algorithm

Question 27

Advanced

Which AWS component allows resources in a public subnet to communicate with the internet?

Internet Gateway Security group only Private route table only Loopback interface

Question 28

Advanced

Which AWS component is commonly used by private subnet instances to access the internet for updates without being directly public?

NAT Gateway Route 53 only Elastic Load Balancer only CloudWatch only

Question 29

Advanced

A security group in AWS is best described as what?

A stateful virtual firewall A DNS resolver A subnet calculator A physical router

Question 30

Advanced

Which tool captures and analyzes packets from a network interface?

tcpdump hostname passwd df -h

Question 31

Advanced

What does MTU mean in networking?

Maximum Transmission Unit Minimum Transport User Main TCP Utility Managed Traffic URL

Question 32

Advanced

What does TTL help prevent in IP networking?

Packets looping forever DNS records being created SSH keys expiring MAC addresses changing

Question 33

Advanced

Which statement about network IP and broadcast IP is correct?

They are always the same for every subnet They depend on the CIDR/subnet mask They are only used in IPv6 They are assigned to normal hosts first

Question 34

Advanced

For 192.168.1.0/26, how many total addresses are in the subnet?

16 32 64 256

Question 35

Advanced

A server listens on 0.0.0.0:80. What does 0.0.0.0 mean in this context?

The service listens on all available IPv4 interfaces The server has no network card The service is disabled The service is listening only on localhost

Question 36

Advanced

A curl command returns HTTP status code 200. What does it usually mean?

Request succeeded DNS failed Server refused SSH Packet was dropped by ARP

Question 37

Advanced

Which troubleshooting order is most logical when a website is not opening?

Check cable/IP → gateway → DNS → port/service → firewall/application Check application first → ignore IP → ignore DNS Restart server only → never check route Check browser theme → check subnet later

Question 38

Advanced

Which statement best describes HTTPS compared with HTTP?

HTTPS adds encryption using TLS HTTPS removes TCP completely HTTPS is only for DNS HTTPS uses ARP instead of IP

Question 39

Advanced

Which command is useful to check HTTP headers without downloading the full page body?

curl -I https://example.com ip addr flush arp -d https://example.com ss -I https://example.com

Question 40

Advanced

What does DHCP do?

Automatically assigns IP configuration to clients Encrypts web traffic Captures packets Maps public DNS zones only