Network Management, Cryptography, and Client-Server Architecture
Network Management Functional Areas
Network management maximizes efficiency and productivity in a data network transparently to users. It performs various management tasks:
- Fault Management: Locating and correcting network problems and failures, including configuration adjustments.
- Configuration Management: Identifying and configuring critical devices, requiring an inventory to track updates.
- Security Management: Controlling access to information and data.
- Network Performance Management: Measuring the
Client-Server Architecture, WANs, Internetworking, and Web Services
Lecture 4 – Client/Server and Sockets
Client-Server: Provides high-level functionality that users access. They use the transport mechanism provided by a network (such as the internet). They are identified by high-level names, while low-level details are hidden. They provide functions for exposing, accessing, and using services.
Single Server Multiple Services: Makes better use of CPU cycles and reduces the cost of additional server overhead. When there are multiple services on a single server, they
Read MoreUnderstanding Internet Infrastructure and Protocols
Chapter 1: Internet Foundations
- Funding the Internet: Primarily by governments, agencies, and large organizations like NASA. The American government, for example, founded the Internet2 project.
- Regional Networks: Provide internet access within a specific geographic area, often formed by smaller networks connected together.
- Registrars: Private companies responsible for registering internet domains.
- InterNIC: A main registrar and information center responsible for maintaining domains.
- Internet Service
Networking Essentials: Narrowband vs. Broadband, ARP, and More
Networking Fundamentals: Key Concepts Explained
Narrowband vs. Broadband
- Narrowband Technologies: Refers to technologies that deliver data at up to 128 Kbps. For example, dial-up connections with a maximum data rate of 56 Kbps are classified as narrowband.
- Broadband Technologies: Generally refers to technologies that offer high data rates. The exact boundary between broadband and narrowband is not clearly defined.
Thicknet vs. Thinnet
Ethernet LANs using thick cable for interconnection are referred to
Read MoreDiffServ, Multicast, RTP, SCTP, SIP, H.323 & Watermarking
DiffServ Expedited and Assured Forwarding
Two PHBs (Per-Hop Behaviors) are defined for DiffServ:
- Expedited Forwarding PHB: Applied to real-time traffic and related to the guaranteed service transfer capability. It specifies that the departure rate of a class of traffic from a router must equal or exceed a configured rate.
- Assured Forwarding PHB: Applied to elastic traffic and related to the controlled load service transfer capability. It divides traffic into four classes, each guaranteed a minimum
Transport Layer Functions and Protocols
Transport Layer
The transport layer performs two main functions:
- Expands the delivery system between two processes at the network layer to encompass two processes at the application layer running on end systems.
- Controls the transmission rate of entities to avoid or recover from congestion within the network.
The protocols of this layer oversee the process flow of data between processes. The application layer programs interact with each other without any obligation to attend to the lower layers.