From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/buttons.html | 107 ++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/content.html | 135 +++++++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/index.html | 29 +++++ Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/media.html | 21 ++++ 4 files changed, 292 insertions(+) create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/buttons.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/content.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/index.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/media.html (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4') diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/buttons.html b/Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/buttons.html new file mode 100644 index 0000000..afbcbd5 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch6/6_1_4/buttons.html @@ -0,0 +1,107 @@ + + + + + + + + + + + +New Page 1 + + + + + + + + + + + + + + + + + + + + + + + +
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+ + 6.1 + Workstations and Servers 
  + 6.1.4 + Introduction to NOS 
+ + + + + + +
+ + A computer operating system (OS) is the + software foundation on which computer applications and services run on + a workstation. Similarly, a network operating system (NOS) enables + communication between multiple devices and the sharing of resources + across a network. A NOS operates on UNIX, Microsoft Windows NT, or + Windows 2000 network servers. +

+ + Common functions of an OS on a workstation + include controlling the computer hardware, executing programs and + providing a user interface. The OS performs these functions for a + single user. Multiple users can share the machine but they cannot log + on at the same time. In contrast, a NOS distributes functions over a + number of networked computers. A NOS depends on the services of the + native OS in each individual computer. The NOS then adds functions + that allow access to shared resources by a number of users + concurrently.

+

+ + Workstations function as clients in a NOS + environment. When a workstation becomes a client in a NOS environment, + additional specialized software enables the local user to access + non-local or remote resources, as if these resources were a part of + the local system. The NOS enhances the reach of the client workstation + by making remote services available as extensions of the local + operating system.

+

+ + A system capable of operating as a NOS + server must be able to support multiple users concurrently. The + network administrator creates an account for each user, allowing the + user to logon and connect to the server system. The user account on + the server enables the server to authenticate that user and allocate + the resources that the user is allowed to access. Systems that provide + this capability are called multi-user systems.

+

+ + A NOS server is a multitasking system, + capable of executing multiple tasks or processes at the same time. The + NOS scheduling software allocates internal processor time, memory, and + other elements of the system to different tasks in a way that allows + them to share the system resources. Each user on the multi-user system + is supported by a separate task or process internally on the server. + These internal tasks are created dynamically as users connect to the + system and are deleted when users disconnect.

+

+ + The main features to consider when + selecting a NOS are performance, management and monitoring tools, + security, scalability, and robustness or fault tolerance. The + following section briefly defines each of these features. +

+

+ + Performance
+ A NOS must perform well at reading and writing files across the + network between clients and servers. It must be able to maintain fast + performance under heavy loads, when many clients + are making requests. Consistent performance under heavy demand is an + important standard for a NOS.

+

+ + Management and monitoring
+ The management interface on the NOS server provides the tools for + server monitoring, client administration, file, print, and disk + storage management. The management interface provides tools for the + installation of new services and the configuration of those services. + Additionally, servers require regular monitoring and adjustment.

+

+ + Security
+ A NOS must protect the shared resources under its control. Security + includes authenticating user access to services to prevent + unauthorized access to the network resources. Security also performs + encryption to protect information as it travels between + clients and servers.

+

+ + Scalability
+ Scalability is the ability of a NOS to grow without degradation in + performance. The NOS must be capable of sustaining performance as new + users join the network and new servers are added to support them.

+

+ + Robustness/fault tolerance
+ A measure of robustness is the ability to deliver services + consistently under heavy load and to sustain its services if + components or processes fail. Using redundant disk devices and + balancing the workload across multiple servers can improve NOS + robustness.

+

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