No it is not, but If you have this or CCNA it will be helpful. But it is not a must.
It is not required as per theory but I would suggest you have a basic knowledge of Networking before diving into Ethical Hacking , it will really help you in Ethincal hacking and also in career options as well.
Will be a great add on.
If you want to go for Networking you can go for CCNA Routing Switching and move from their own wards to many things like Security, Cloud Computing, IOT, Wireless, Voice.
For lectures on CCNA, CCENT and Basic Networking do check below youtube channel:
The CEH certificate is EC-Council's most popular and sought-after credential. Typical job titles for CEH-certified professionals include penetration tester, network security specialist, ethical hacker, security consultant, site administrator and auditor. Beyond the significant corporate job opportunities, becoming CEH certified opens the door to lucrative security positions in the government IT sector, as the CEH is endorsed and used by the National Security Agency (NSA), the Committee on National Security Systems (CNSS) and the Department of Defense (DoD) as a benchmark to clear personnel and contractors with privileged access to sensitive information.
Universities, colleges and private computer schools offer courses and degrees featuring CEH certification prep and training programs that align with EC-Council's Certified Ethical Hacker curriculum.
There are a lot of ethical hacking and security-related IT certifications available in the market that can help you in knocking the door of this highly advanced technology. However, the Certified Ethical Hacker certification offered by the EC-Council is one fine starting point where you can have a perfect kickstart. The intermediate level CEH Certification aims at enumeration, system hacking, SQL injection, social engineering, viruses, and other attack forms.
Apart from this, the SANS GIAC curriculum and the PenTesting Hacking series by mile2 is are worth having a look to start your career in ethical hacking. SANS offered GIAC Penetration Tester (GPEN) Certification as well as the GIAC Exploit Researcher and Advanced Penetration Tester (GXPN) Certification both are quite good for desiring white hat hackers.
On the other hand, the Pen Testing Hacking series by mile2 also offer many certifications including the foundational Certified Vulnerability Assessor (CVA), Certified Professional Ethical Hacker (CPEN), Certified Penetration Testing Engineer (CPTE), and the advanced-level Certified Penetration Testing Consultant (CPTC).
All the best in your career endeavors.
Information security is a great field to get into as the need for more professionals will continue to be in demand for a long time. There's a lot to know about CEH and the requirement to become an expert in networking is definitely a must. Your question about a CCNT certification - (I'm assuming you're talking about the Certified in Convergent Network Technologies (CCNT)) this is a Telecom specific type certification, ie: technologies used in telecommunication. CompTIA offers a more overall networking concepts at an entry level certification - Network +. I'm more familiar with Cisco type certifications and their pipeline to becomming a networking expert - one of which is network security. Cisco's CCENT is their entry level cert. There are many other network certifications out there, and you should fully understand the networking basics at the entry level first, then move into more advanced certifications.
Going alone with just the CEH (or other advanced professional certs) will probably not go as far you would think without other backing certifications/degrees/experience. Depending upon the company, most will want to see a progession of expertise towards achecieving the CEH certification as it does require a 2yr min. work in the security field before it can be validated.
There are many other network hardware makers - (https://en.wikipedia.org/wiki/List_of_networking_hardware_vendors) and they're mostly all using the same communication standards, and a lot of them have their own certification pipelines from entry level to architect. Many schools offer similar courses on concepts and standards but may not offer a certification, only course completions.
I know many people in the security field and most do have some sort of networking certification, and they all started with the entry level as I had suggested. Here's a quote from the EC-Council webiste (https://www.eccouncil.org/) - "The CEH credential certifies individuals in the specific network security discipline of Ethical Hacking from a vendor-neutral perspective" -- This site has a lot of good information about the field.
By all means, go for the CEH if that's your passion! Many companies are now sponsoring "Hack-a-thons" - this is another good way to gain valuble experience, go attend and familiarize yourself or be a participant.
Best of Luck!