A comparison and contrast between Rip, OSPF, and BGP protocols

Part I- Routing Information Protocol (RIP)
Starting with basic information that I learned in Dcom101, the only time I have seen RIP, I remember that it is a distance-vector protocol; based on hop count or number or routers between client and server. Routing Information Protocol, or RIP, Until I started research for this paper, I was under the impression that Routing Information Protocol was an antique and that it was only good for what I had used it for; the Dcom101 lab on RIP. While it does still exist as next generation RIP (RIPng) and it has a lot of flaws. A look at RFC 2080 shows those flaws immediately, namely by admitting them. Firstly, the RFC is dated “January 1997” so it is over 20 years old, which implies deprecated if not obsolete.
To quote the RFC “RIPng was designed to work as an IGP in moderate-sized AS’s. It is not intended for use in more complex environments.” The RFC then goes on to describe limitations. The upward bound of 15 hops might make certain destinations impossible or nearly impossible to reach. There is a possibility of a loop forming and eating up all the bandwidth. Even though this is stated as “unlikely” a malicious actor could create such a loop and weaken of even disable a network. Fixed metrics like hop count are not based on actual time or bandwidth.
The fundamental problem I remember from practicing RIP in the packet tracer lab way back when, was that it copied the whole routing table of the directly connected routers. This means the router will have to learn the entire internet or relearn what has been flushed out of the routing table, not a low-latency task in my imagination.
The metric of 15 hops for time to live stops the thing from endlessly looping, so looping is worked in at a fundamental level. We see this protocol in reference to “Layer 3 Switching” which implies it is dated and although revolutionary for its time, 1988, as seen in RFC 1058(https://tools.ietf.org/html/rfc1058) almost 30 years later in 2018, it is hard to find a use or even make a comparison to other routing protocols. I would be curious is Rip systems are still in use in less developed countries, and I would be willing to bet they are rarer. Most of rural Africa missed out on land-line telephones and “leapfrogged” to cellular telephones. It is easy to see where 1932 Hot-Rods are located on the globe because of the interest in them. Bulletin Board Services and H.A.M. radios have their collective niches also. I have not been able to find a diagram of the legacy rip systems in place, and I doubt there ever will be such a map or data set created because of lack of interest and funding. By comparison we know ISPs use Border Gateways and we know where fiber-optic cables run under the sea. These facts, logically, demonstrate the low overhead of using Rip, the only advantage I can possibly see. I would not build a system with Rip for any foreseeable reason, although I have yet to build anything with more than 3 routers.
Actual Picture of “Rip Routing” coming up during Job Interview. Source: All You can Meme

A quick Google of “Is Rip Routing still used” led me to Cisco, particularly: https://learningnetwork.cisco.com/thread/94856 which had a few actual applications and a ton of great sarcasm. Rip routing is still used in legacy systems and can be applied to any system with less than 15 routers, given that system will never need to scale. It can be applied within a system as router-on-a-stick for example. Even though Rip is not a good idea, given a legacy device that would only support Rip and a lack of funds for a new router it could have a possible use. I imagine in the “Parade of Internet” it is the working model-A car that can make it to the Judge’s Stand at the end of the Parade but needs to go back on a flatbed to get home. I could not even imagine placing the words “Rip Routing” on a job application because “Legacy Systems Engineer” sounds better. Rip, like BBS, NPL, Rambus, and other older systems are an important part of internet history, and Rip in particular was on the stage in the 1990’s when global communication systems evolved very quickly and were replaced by the internet almost instantly as I remember.

Best diagram of real-use of Rip Routing , rippd from above-named Cisco Forum