Basics
Password Sniffing
In the fall of 1994 at Loyola University I remotely changed the root password on several CS-department unix…
July 21, 2021 · Rajil TLAuthor: Rajil TL
Rajil TL is a SenseCentral contributor focused on tech, apps, tools, and product-building insights. He writes practical content for creators, founders, and learners—covering workflows, software strategies, and real-world implementation tips. His style is direct, structured, and action-oriented, often turning complex ideas into step-by-step guidance. He’s passionate about building useful digital products and sharing what works.
Basics
LANs and Ethernet
A local-area network, or LAN, is a system consisting of • physical links that are, ultimately, serial lines • common…
July 21, 2021 · Rajil TLBasics
Packets Again
Perhaps the core justification for packets, Baran’s concerns about node failure notwithstanding, is that the same link can…
July 21, 2021 · Rajil TLBasics
Congestion
Switches introduce the possibility of congestion: packets arriving faster than they can be sent out. This can happen…
July 21, 2021 · Rajil TLBasics
Routing Loops
A potential drawback to datagram forwarding is the possibility of a routing loop: a set of entries in…
July 21, 2021 · Rajil TLBasics
Traffic Engineering
In some cases the decision above between routes A S1 S2 S4 B and A S1 S3 S4…
July 21, 2021 · Rajil TLBasics
Topology
In the network diagrammed in the previous section, there are no loops; graph theorists might describe this by…
July 21, 2021 · Rajil TLBasics
Datagram Forwarding
In the datagram-forwarding model of packet delivery, packet headers contain a destination address. It is up to the…
July 21, 2021 · Rajil TLBasics
Data Rate, Throughput and Bandwidth
Any one network connection – eg at the LAN layer – has a data rate: the rate at…
July 21, 2021 · Rajil TLBasics
What is Network Management?
Having made our way through the first seven chapters of this text, we’re now well aware that a…
July 21, 2021 · Rajil TL