Lockdown thoughts

We means All world are in lockdown. When I talked to my out of India friends they also same situation like me. So no worries all are on hold.

Suddenly I thinking that when everyone is in lockdown how online service work and from that may be someone earn something from lockdown.

So like me everyone sit in home and do nothing just enjoy with Family 24*7 fun. But that nothing put smile on family so I am happy to do nothing. We can earn when world with me out on hold.

Stay with family will bring some new activity day by day so each other understanding also increase. We can also save us from deathly diseases like Corona virus (covid-19).

Maybe everyone like this situation once in while but not like in current situation. So positively is superpower.

Only remember one line

Ye Waqt Bhi Nikal Jayega

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IP Addressing (IPv4)

After long time I give some time to share my knowledge.

This time I will share IP Addressing and their classes with you.

– There are 4 octets decimal dotted format in IPv4. like 192.168.1.1

– This 4 octets in binary form : 00000000.00000000.00000000.00000000.

– There are five classes in IPv4 Addressing.

1) Class A 2) Class B 3) Class C 4) Class D 5) Class E.

– Class A : 0-126 (remember 127 reserved for loopback), Default Mask : 255.0.0.0, N.H.H.H, 11111111.00000000.00000000.00000000, CIDR : /8.

– Class B : 128-191, Default Mask : 255.255.0.0, N.N.H.H, 11111111.11111111.00000000.00000000, CIDR : /16.

– Class C : 192-223, Default Mask : 255.255.255.0, N.N.N.H, 11111111.11111111.11111111.00000000, CIDR : /24.

– Class D : 225-239 (224 is reserved for Multicast Addresses), This Class Addresses we can not use.

– Class E : 240-254, This Class Addresses also we can not use.

Best of Luck

–

The OSI Model – Open System Interconnection Model

This Model define by  International Organization for Standardization (ISO) in 1970.

• This is not a Physical model
• This model divides the network communication process in smaller and simpler component.
• This is very useful tools for network Troubleshooting
• There are seven layers in OSI Model
  • layer 7 – Application Layer
  • layer 6 – Presentation layer
  • layer 5 – Session layer
  • layer 4 – Transport layer
  • layer 3 – Network layer
  • layer 2 – Data Link layer
  • layer 1 – Physical layer
• Layers 7, 6 and 5 (Upper layers) main focus on services to application
• Layers 4,3,2, and 1 (Lower layers) main focus on end to end data delivery
• Data Unit in L4 is called Segment
• Data Unit in L3 is called Packet
• Data Unit in L2 is called Frame
• Data Unit in L1 is called Bits
• Encapsulation – Data moves down (7>6>5>4>3>2>1)
• Decapsulation – Data moves up (1>2>3>4>5>6>7)

How I start CCNA R&S?

After graduation, I wanted to enter in actual Networking field, so I was searching on internet that ‘How to start career in Networking field?’. ‘Google.com’ gave me so much option in reply to my search. It shown me that there are lots of course related to Networking (CCNA to CCIE to CCDE). Its also shown me information about some institutes which is offered that types of courses. After inquiry in some of institute i realize that i should start with CCNA R&S. Finally I started my journey towards networking with CCNA R&S from NETWORXX, This institute has best trainers in India

ABOUT ME

I am Aamir (CCNA R&S Certified) started my career in Networking field from 2012. I am originally from India. I done Schooling from Gujarat, India till XII standard. After that I was planning for join B.tech degree in 2007. I choose Electronic & communication field in B.tech. After graduation, Immediately I join CCNA course in NETWORXX. I got certification of CCNA R&S in 2013 by CISCO with cisco ID – CSCO12337419. After that I was planning to go deep in Networking field so I learned about  CCNP R&S, CCNA Security, CCNP Security, and CCIE Security version 4. All these course I learned from NETWORXX by Mr. Khawar butt (Penta CCIE & CCDE). And In 2014, I successfully passed CCIE Security version 4 Written exam Which is required for attend CCIE Security Lab exam.