The RFC 1918 IP private addresses are not allowed on the Internet
The RFC 1918 IP private addresses, also known as non-routable IP addresses, are a set of IP address ranges that have been reserved for private network use. These addresses are not allowed to be used on the public Internet. The reason for this restriction is to prevent conflicts and routing issues that could arise if
A datagram is a block of data in the TCP protocol
A datagram is not a block of data in the TCP protocol. In the field of computer networking, specifically in the Internet Protocol Suite, which includes the TCP/IP protocol, a datagram refers to a unit of data that is transmitted over a network. However, it is important to note that datagrams are primarily associated with
The IP subnet mask's bits set to 1 tell us which part of the IP address is the host address
The IP subnet mask plays a important role in determining the network and host portions of an IP address. It is a binary pattern that is applied to an IP address to divide it into network and host components. In this context, the bits set to 1 in the subnet mask indicate the network portion
- Published in Cybersecurity, EITC/IS/CNF Computer Networking Fundamentals, Internet protocols, IP addressing in depth
Is subnetting in the IP space is breaking down large networks into small ones?
Subnetting in the IP space is indeed a technique used to break down large networks into smaller ones. It is a fundamental aspect of computer networking that plays a important role in optimizing network performance, improving security, and efficiently utilizing IP addresses. Subnetting allows for the division of a single network into multiple smaller networks,
- Published in Cybersecurity, EITC/IS/CNF Computer Networking Fundamentals, Internet protocols, IP addressing in depth
The non-authoritative DNS lookup means the queried DNS server doesn't own a particular domain and hence may not have all of the information about it.
The non-authoritative DNS lookup refers to a situation where the queried DNS server does not have ownership of a specific domain and may not possess all the information associated with it. This concept is an essential aspect of the Domain Name System (DNS), which plays a important role in translating human-readable domain names into machine-readable
The NAT process in router can change the private IP address to a public IP address.
Network Address Translation (NAT) is a fundamental process used in computer networking to enable communication between devices with private IP addresses and devices with public IP addresses. One of the key functions of NAT is to change the private IP address to a public IP address, allowing private network devices to communicate with public network
Port numbers of source and destination hosts are added in the headers of data blocks under the OSI model's Transport layer, in order to allow designation of which data blocks communicated are meant to be received by relevant applications
In the field of computer networking, specifically in the realm of Internet protocols and the OSI model, the inclusion of port numbers in the headers of data blocks at the Transport layer serves a important purpose. These port numbers play a significant role in facilitating communication between different applications running on source and destination hosts.
- Published in Cybersecurity, EITC/IS/CNF Computer Networking Fundamentals, Internet protocols, IP addressing in depth
Single core fiber optics cables can operate in half duplex and not in full duplex mode.
Single core fiber optic cables can indeed operate in half duplex mode but not in full duplex mode. This limitation is due to the physical properties of the fiber optic medium itself. To understand why this is the case, it is important to consider the concepts of half duplex and full duplex communication modes, as
The main fiber optics connectors used in data networking are FDDI and ST?
The main fiber optics connectors used in data networking are not FDDI and ST. FDDI (Fiber Distributed Data Interface) and ST (Straight Tip) connectors are actually types of fiber optic connectors, but they are not commonly used in modern data networking. In fact, they have been largely replaced by other connector types that offer better
- Published in Cybersecurity, EITC/IS/CNF Computer Networking Fundamentals, Physical networks, Cabling devices
IP multicast and IP broadcast are synonymous terms?
IP multicast and IP broadcast are not synonymous terms in the context of computer networking. While both involve the transmission of data to multiple recipients, they differ in terms of scope and addressing mechanisms. In this answer, we will consider the OSI model, specifically the network layer, to understand the distinctions between IP multicast and
- Published in Cybersecurity, EITC/IS/CNF Computer Networking Fundamentals, OSI Model, Introduction to the OSI Model