Comparisons
Side-by-side comparisons of technologies people often mix up, with a simple table and which to choose.
Switch vs Router: what is the difference?
A switch connects devices inside one network; a router connects different networks together. Here is the difference in plain words, with a table and when you need each.
5 min read · Beginner
Hub vs Switch: what is the difference?
Hubs repeat everything to every port; switches send traffic only where it needs to go. Why hubs disappeared and switches took over.
5 min read · Beginner
TCP vs UDP: what is the difference?
TCP is reliable and ordered; UDP is fast and simple. What each protocol does, a clear comparison table, and which applications use which.
5 min read · Beginner
IPv4 vs IPv6: what is the difference?
IPv4 uses 32-bit addresses and is running out; IPv6 uses 128-bit addresses with room for every device. The key differences in one table.
5 min read · Beginner
IDS vs IPS: what is the difference?
An IDS watches and alerts; an IPS sits in the traffic path and can block attacks. The differences, pros and cons, and where each fits.
5 min read · Beginner
Firewall vs Antivirus: what is the difference?
A firewall controls which network traffic is allowed; antivirus finds and removes malware on a device. Why you need both, explained simply.
5 min read · Beginner
WPA2 vs WPA3: what is the difference?
WPA3 is the newer Wi-Fi security standard with stronger protection against password guessing. How it differs from WPA2 and whether you should switch.
5 min read · Beginner
HTTP vs HTTPS: what is the difference?
HTTPS is HTTP protected by TLS encryption. What the padlock really means, what it does not mean, and why every site should use HTTPS.
5 min read · Beginner
VPN vs Proxy: what is the difference?
A VPN encrypts all your device’s traffic through a tunnel; a proxy forwards traffic for one app or browser, often without encryption. How they differ and when to use each.
5 min read · Beginner
AWS vs Azure: what is the difference?
Amazon Web Services and Microsoft Azure are the two largest cloud platforms. How they compare for services, identity, networking and careers, without the hype.
6 min read · Intermediate
OSPF vs EIGRP: what is the difference?
OSPF is an open-standard link-state protocol; EIGRP is Cisco’s advanced distance-vector protocol. A clear comparison for CCNA and CCNP learners.
6 min read · Intermediate
Symmetric encryption vs Asymmetric encryption: what is the difference?
Symmetric encryption uses one shared key; asymmetric uses a public and private key pair. How they differ and why HTTPS uses both.
5 min read · Intermediate
Wi-Fi vs Ethernet: what is the difference?
Wi-Fi is wireless and convenient; Ethernet uses a cable and is faster and steadier. Here is when each one makes sense at home and at work.
5 min read · Beginner
SSD vs HDD: what is the difference?
SSDs use chips and are fast and silent; hard drives use spinning disks and give more space for less money. Which one belongs in your next laptop or backup?
5 min read · Beginner
4G vs 5G: what is the difference?
5G promises faster speeds and lower delay than 4G, but the difference you notice depends on where you are. A plain comparison of the two mobile network generations.
5 min read · Beginner
Public IP vs Private IP: what is the difference?
Your router has one public address on the internet, while every device at home gets its own private one. Here is how the two work together, and what each one reveals.
5 min read · Beginner
DNS vs DHCP: what is the difference?
DNS turns website names into addresses; DHCP hands out addresses to devices when they join a network. Two essential services that are easy to mix up.
5 min read · Beginner
SSH vs Telnet: what is the difference?
Both let you control a router, switch or server remotely by typing commands. Telnet sends everything in plain text; SSH encrypts it. Here is why SSH replaced Telnet.
5 min read · Beginner
SMS codes vs Authenticator apps: what is the difference?
Both add a second step to your sign-in, but they are not equally strong. A plain comparison of text message codes and authenticator apps for 2-step verification.
5 min read · Beginner
LAN vs WAN: what is the difference?
A LAN connects devices in one building; a WAN links networks across cities and countries. The two terms you will see on every router, explained.
5 min read · Beginner
