Subnetting Made Easy (Part 2)

This post is the sequel of “Subnetting Made Easy (Part 1)” so let’s repeat our “magic table”:

128 192 224 240 248 252 254 255

In CCNA (or Networking quizzes) you have an IP Address in this format: and you need to find, Network, Broadcast and Subnet Mask. All of this should be done in 45 seconds. How can we do and how the previous table can help us?
Continue reading Subnetting Made Easy (Part 2)

CCNA, Wireshark and GNS3: IPv4 Ethernet Broadcast

I started to study for CCNA with the “CCNA 200-120 Video Boot Camp With Chris Bryant” the course is amazing but there is a lack of pratice, so I decided to use GNS3 in order to build my (virtual) lab and understand more about network.

GNS3 is an alternative or complementary software tool to using real computer labs for computer network engineers, administrators and people studying for certifications such as Cisco CCNA, CCNP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE. It can also be used to experiment features or to check configurations that need to be deployed later on real devices. Continue reading CCNA, Wireshark and GNS3: IPv4 Ethernet Broadcast

.cab file analysis

Hello all,

I just received an email with the subject: “Bill number B81DB5488CC438A2” and the attachment is a lovely .cab file


According to VirusTotal the detection rate is 13/57: so I decided to work on a little analysis of the file. Continue reading .cab file analysis