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Managing Networks Unit 5 Lesson 1 & 2
Transcript of Managing Networks Unit 5 Lesson 1 & 2
A network operating system (NOS) is
a type of systems software that is specifically written to support networking functions, particularly over an LAN.
Mind map 3
NOS with the
basic features of each
What is Networking Protocol?
A network protocol defines rules and conventions for communication between network devices.
Protocols for computer networking all generally use packet switching techniques to send and receive messages in the form of packets.
Network technologies Successful network management involves a number of different types of technologies:
Network operating systems
A network OS commonly consists of a server
part and a client part – OS needs to be installed
on each device (e.g. workstation) that wants
to communicate with the server.
implementation of networking protocols
user log in and authentication;
mechanisms for sharing files and resources such as printers;
facilities for managing administrative functions such as security;
SNMP is a protocol that performs network management by monitoring
devices for adverse conditions that require administrative attention
(e.g. data traffic bottlenecks, overloaded CPUs).
ICMP is used as a tool to help technicians (and operating systems) to discover problems during IP data transmissions.
FTP is a protocol that is used to transfer text or binary files over a TCP/ IP connection (i.e. over the internet).
TFTP is often seen as a simplified (and therefore less capable and secure)
version of FTP, relying on TCP/IP for data transfer support.
HTTP is the set of rules used by a web browser for requesting files (images, text, sound, video etc.) from a web server.
ICMP: A simple ping action determines whether the node is responding to network communications.
CPU Load: A measure of how efficiently the node’s processing unit is performing its operations
Memory Usages: The amount of a node’s total memory capacity in use.
Processes: Indicates the state of the processes running on the node.
Disk Use: The amount of a node’s hard disk capacity in use.
IP Service: TCP layer tests for application availability.
LAN and WAN
What is Topology?
What are the common topology in computer networks?
Advantages and disadvantages of each of those.
but what is NTP?
NTP is a protocol used for synchronising the internal clocks of computer systems over a typical packet-switched network. This would, for example it enable all servers and workstations on a LAN to have the same time.
Mind Map on different protocols and it uses
Quick recap of the day
What have we learned?
Home work (describe the mind maps), what will happen next week
Network Layout: Although LANs come in many different shapes and sizes, they generally use similar technologies and components.The most common type of LAN is based on Ethernet technology, as originally devised by Digital, Intel and Xerox. This was used as the blueprint for the IEEE’s 802.3 standards
this is something that never changes.
Einstein realized that matter and energy are interrelated and made the famous formula that expresses this relationship mathematically:
E = m x c
speed of light
Database Server? Difference between File and Database Server?
Can you describe the network technology now?
Lets complete P1
Ethernet (thinnet thicknet), fast and Gigabyte Ethernet
Application server for providing applications that can be shared with client workstations; they may even split some of the processing
Proxy server for providing an intermediary link between (typically) the internet and client workstations on the network.
Workstations – these are simple client computer systems connected to the network, workstation can be:
Thick client – a traditional workstation that has installed applications and is responsible for processing all of its own data.
What is Thin Client?
Scorecard of Thick and Thin Client
Mail server for processing email (electronic mail) requests
What FTP Server Does?
Web server for processing HTTP (Hypertext Transfer Protocol) requests for HTML Hypertext Markup Language) files and associated assets(images,video, sound etc.).
What is Server?
File server for managing access to shared network drives and folders.
Print server for managing print queues to network
Mesh or Hybrid topology? which one would you prefer? Why?
SNMP: A poll action determines whether SNMP-based data can be retrieved from the node.
What NOS Does?