![]() ![]() The network layer is in charge of routing packets across networks. For example, in voice/video calls, or when playing online games. UDP is used in connections where speed takes precedence over reliability.For example, in sending texts, streaming videos, or sending files. TCP is used in connections where reliability is of paramount importance.The transport layer optionally ensures the reliability of communications. HTTPS fixes that problem by encrypting data being received and sent by a host, and is still in use to this day since its introduction in 1994. This means that if a malicious actor gained unlawful access into a network (or if they are in the vicinity of the victim), and if a user enters their login details to gain access to their own account on a certain website, the malicious actor will be able to acquire them by sniffing the packets on the network sent by the unsuspecting user. HTTP is not secure because the data is sent in plain text. HTTPS is the secure version of HTTP, and is used to fetch HTML files to load web pages.DNS translates a domain name into the correct IP address.DNS, SMTP, HTTPS and HTTP protocols are used in this layer.This also means that there are different types of evidence we can collect from each layer. Each layer employs different protocols to ensure that data moves from one place to another correctly. Namely, the application, transport, network, and data-link layers. In computer networking, there are several layers. ![]() Network traffic should be captured at an endpoint, such as a proxy server, or at a forensic PC connected to the mirror port of an internet router.Īt these locations, investigators can collect unicast traffic sent from the host in question. To capture network traffic, run a network monitoring tool such as Wireshark. This is why network forensics should be a proactive investigation.
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