In order to facilitate flexible network service virtualization and migration, network functions (NFs) are increasingly executed by software modules as so-called “softwarized NFs” on General-Purpose Computing (GPC) platforms and infrastructures. GPC platforms are not specifically designed to efficiently execute NFs with their typically intense Input/Output (I/O) demands. Recently, numerous hardware-based accelerations have been developed to augment GPC platforms and infrastructures, e.g., the central processing unit (CPU) and memory, to efficiently execute NFs. This article comprehensively surveys hardware-accelerated platforms and infrastructures for executing softwarized NFs. This survey covers both commercial products, which we consider to be enabling technologies, as well as relevant research studies. We have organized the survey into the main categories of enabling technologies and research studies on hardware accelerations for the CPU, the memory, and the interconnects (e.g., between CPU and memory), as well as custom and dedicated hardware accelerators (that are embedded on the platforms); furthermore, we survey hardware-accelerated infrastructures that connect GPC platforms to networks (e.g., smart network interface cards). We find that the CPU hardware accelerations have mainly focused on extended instruction sets and CPU clock adjustments, as well as cache coherency. Hardware accelerated interconnects have been developed for on-chip and chip-to-chip connections. Our comprehensive up-to-date survey identifies the main trade-offs and limitations of the existing hardware-accelerated platforms and infrastructures for NFs and outlines directions for future research.

/pdf/hardware-accelerated-platforms-and-infrastructures-for-2h4wc9goe8.pdf

Hardware-Accelerated Platforms and Infrastructures for Network Functions: A Survey of Enabling Technologies and Research Studies

Next Generation Wireless Networks (NGWNs) focus on convergence of different Radio Access Technologies (RATs) providing good Quality of Service (QoS) for applications such as Voice over IP traffic (VoIP) and video streaming. The voice applications over IP networks are growing rapidly due to their increasing popularity and cost. To meet the demand of providing high-quality of VoIP at anytime and from anywhere, it is imperative to design suitable QoS model. In this paper we conduct simulation study to evaluate the QoS performance of WiMAX and UMTS for supporting VoIP. We designed simulation modules in OPNET for WiMAX and UMTS, and carried out extensive simulations to evaluate and analyze several important performance metrics such as Mean Opinion Score (MOS), end-to-end delay, jitter and packet delay variation. Simulation results show that WiMAX outscores the UMTS with a sufficient margin, and is the better technology to support VoIP applications compared with UMTS.

/pdf/performance-evaluation-of-quality-of-voip-in-wimax-and-umts-11in4sb277.pdf

Performance Evaluation of Quality of VoIP in WiMAX and UMTS

 DIRIGIDO A profesionales de las diferentes areas que convergen en la seguridad y salud ocupacional, tales como: Recursos Humanos, Medio Ambiente, Seguridad e Higiene Industrial, Servicio Medico, Produccion, Mantenimiento, Vigilancia, Servicios Generales, etc. Asi como, todas aquellas personas que deseen ampliar sus conocimientos en Seguridad y Salud Ocupacional de los sectores publicos y privados.

/pdf/universidad-nacional-de-ingenieria-4q37ekv0ix.pdf

Universidad nacional de ingeniería

Techniques and algorithms for access control list optimization

Data security is an essential requirement, especially when sending information over a network. Network security has three goals called confidentiality, integrity and availability (or Access). Encryption is the most common technique used to achieve this goal. However, the computer society has not yet agreed on a standard method to measure data security. The ultimate goal of this study is to define security metrics based on different aspects of network security, and then demonstrate how these metrics could be used in Quality of Service (QoS) routing to find the most secure path connecting two distant nodes (source and destination) across an internetwork. Three security metrics are proposed in this document, these metrics have been derived from three important issues of network security, namely: authentication, encryption and traffic filtration techniques (firewalls and intrusion detection systems). The metrics follow different composition rules in that the first is binary, the second is either concave or additive and the last is multiplicative. Routing algorithms that make use of such metrics have been implemented in the C# programming language to test the viability of the proposed solution. Computational effort and blocking probability are the most commonly used performance measures were used to assess the behavior and the performance of these routing algorithms. Results obtained show that the algorithms were able to find feasible paths between communicating parties and helped in making reasonable savings in the computational effort needed to find an acceptable path. Consequently, higher blocking probabilities were encountered, which is thus the price to be paid for the savings.

Network security for QoS routing metrics

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Cisco: A Beginner's Guide

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