Software Architecture and System Modeling Techniques
Context and Process Models
Context models illustrate the other systems in the environment. Process models show how the system being developed is used in broader business processes. UML activity diagrams define business process models.
Interaction Models
Interaction models cover:
- User interaction (user inputs and outputs) – this identifies user requirements.
- Interaction between one system and another – this shows the communication problems that can arise.
- Interaction between the components of the systems
Network Layer Functions, IPv4, Switching, NAT, ARP, RARP, DHCP, and More
Network Layer Functions
The network layer is the lowest one in the OSI model that is concerned with actually getting data from one computer to another, even if it is on a remote network. In contrast, the data link layer only deals with devices that are local to each other.
- Logical Addressing: Every device that communicates over a network has a logical address, sometimes called a layer three address. For example, Internet Protocol (IP) is the network layer protocol, and every machine has an IP address.
Network Management, Linux Utilities, and Operating Systems
SNMP and UDP
Simple Network Management Protocol (SNMP) is a protocol used for network management, allowing administrators to monitor and manage network devices such as routers, switches, servers, and printers. SNMP operates in a client-server model where the SNMP manager (client) communicates with SNMP agents (servers) on the devices. It uses a hierarchical structure of Management Information Base (MIB) to define the data that can be monitored and controlled.
User Datagram Protocol (UDP) is a connectionless
Read MoreSymmetric Shared Memory Architecture and Cache Coherence
Symmetric Shared Memory Architecture
Symmetric Shared Memory (SSM) architecture is a type of multiprocessor architecture where multiple processors share a common memory space and have equal access to the shared memory. In SSM architecture, all processors are connected to the shared memory through a shared bus or interconnect.
Characteristics of Symmetric Memory Architecture
- Shared Memory: All processors share a common memory space, which allows for efficient communication and data sharing between processors.
Software Development and Testing Techniques for Key Systems
Library Information System: SRS
Introduction
The Library Information System (LIS) automates library functions such as book issue, return, and search, allowing users to manage library operations efficiently.
Assumptions
- The system supports both students and staff members.
- Users can search, issue, return, and renew books.
- The system maintains a record of issued books, return dates, and overdue books.
System Features
- User Management: Register, login, and manage users (students, staff).
- Book Catalog: Display
HTML Quick Reference: Tags, Attributes, and Examples
HTML Quick Reference
Simple Rules of HTML
- Element names and attribute names are not case-sensitive; attribute values are.
- Documents start with a
<!doctype...>statement, followed by a header and a text body, all enclosed in<html>…</html>. - The header is enclosed in
<head>…</head>. - The text body is enclosed in
<body>…</body>. - Comments are written as
<!-- comment -->.
Elements marked here with a pilcrow (ΒΆ) are in HTML3 (additions to or changes from
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