Preface: The classes in the java. util. zip package support two widespread compression formats: GZIP and ZIP. Both of these are based on the ZLIB compression algorithm, which is discussed in RFC 1950, RFC 1951, and RFC 1952. Background: Compression Ratio: Gzip generally achieves a higher compression ratio than Snappy. If storage space is a…

Preface: In the virtio protocol, the host side provides emulation of the device, and the guest side is responsible for driving the device. The relationship between host and guest is the relationship between device and driver. We usually use the method of reading and writing temporary registers to control and drive physical devices, but for…

Preface: Netfilter is an infrastructure; it is the basic API that the Linux 2.4 kernel offers for applications that want to view and manipulate network packets. Background: It can not only block unwanted traffic but also block malicious software from infecting the system. In the Linux ecosystem, iptables is a popular firewall that interfaces with…

Preface: Xen is an open-source hypervisor that allows the simultaneous development, execution, and management of multiple virtual machines on one physical computer. Xen offers two types of virtualization: paravirtualization and full virtualization. Background: XenServer is a Citrix product the company acquired from XenSource in 2007. Citrix’s XenServer provides 7 Network interface cards and 16 virtual…

Preface: Perhaps this isn’t the first time this year we’ve heard of Safari and iOS having design flaws. Since both elements are close to each other. It is inevitable that it may have an impact. In addition, Safari includes open source code. So when a design flaw is discovered, sometimes the results look similar. The…

Preface: The Unbreakable Enterprise Kernel (UEK) is a Linux kernel built by Oracle and supported through Oracle Linux support.  Reliable Datagram Sockets (RDS) is a high-performance, low-latency, reliable, connectionless protocol for delivering datagrams. It is developed by Oracle Corporation. It was included in the Linux kernel 2.6.30 which was released on 9th of June, 2009.…

Preface: A Subject Alternate Name (or SAN) certificate is a digital security certificate which allows multiple hostnames to be protected by a single certificate. A SAN certificate may also be called a Unified Communication Certificate (or UCC), a multi-domain certificate, or an Exchange certificate. A Subject Alternative Name (SAN) certificate is capable of supporting multiple…

Preface: This vulnerability published on September 12, 2023. It had CVSS V3 base score 5.3. But based on the vulnerability details described, it seems it is unknown causes. But why does it happen? Background: The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other…

Preface: What is the difference between WebP and JPEG files? Both file types compress the image, making it easier to share and store. However, WebP files are typically much smaller than traditional JPEGs. Background: Microsoft Edge (Chromium), it was first released in 2015 as the successor to Internet Explorer and is based on Google’s Chromium.If…

Preface: Ubuntu Server 22.04 ships with NVIDIA BlueField DPUs as commercial-grade Linux distribution with continuous OS and security updates. DOCA software is available on every leading operating system as a standalone package without a bundled OS for Arm® and x86 architectures. Background: The NVIDIA cloud-native supercomputing platform leverages the NVIDIA BlueField DPU architecture with high-speed,…