Network Operating System Administration
Windows NT, Linux vs Windows, Firewalls, Disk & Storage Management, Shell Scripting
- Study time
- 26 min
- Expected marks
- 8–12 marks
- Difficulty
- Average
- Revision status
- —
Subjective Questions
Priority 1: Core OS & Security (Highest 4-Mark Probability)
Windows NT (New Technology) is a Microsoft personal computer and business network operating system designed for users needing advanced capability. The first version was released in 1993.
It consists of two products: Microsoft NT Workstation (for users needing faster performance) and Microsoft NT Server (for business machines that need to provide services).
- Supports multiple operating system environments and multitasking.
- Has an advanced graphical user interface making it easy to use.
- It is structured, powerful, reliable, flexible, and provides remote login support.
- Very costly and easily prone to virus attacks.
- Requires frequent rebooting and powerful computers (needs more system resources).
- Does not support plug-and-play environments.
Win NT: Made by MS (1993). Comes in Workstation (for users) & Server (for business). 32-bit, uses NTFS, costly, prone to viruses.
Write the definition with the year 1993 first, then name the two products, then give three advantages and three disadvantages as separate points. Underline “New Technology”, “Workstation” and “Server”.
Students confuse Windows NT Workstation with Windows NT Server — Workstation is for users needing faster performance, Server is for business machines that need to provide services.
- 01Windows NT = New Technology, Microsoft, 1993
- 02Two products: NT Workstation + NT Server
- 03Advantages: multitasking, advanced GUI, remote login
- 04Disadvantages: costly, virus prone, frequent rebooting
- 0532-bit, uses NTFS
Linux vs Windows — 8 paired differences
Model Paper Q3: What is a primary financial benefit of using Linux over Windows? -> No licensing is required because it is free and open-source. (Matches your Chapter 2 Q2 comparison table precisely)
Linux vs Win: Linux = Free, Open Source, customizable, no licence, reliable, high security, offline install, case-sensitive. Win = Commercial, closed source, not customizable, licence needed, less reliable, virus-prone, needs internet, case-insensitive, user-friendly.
This is a 5-mark question — write it as a two-column table and give at least 6 to 8 paired differences, one line each. Never answer it as a paragraph.
Students confuse case-sensitive with case-insensitive — Linux file names are case-sensitive, Windows file names are case-insensitive. Also, do not write only 3–4 points for a 5-mark question.
- 01Linux = free + open source / Windows = commercial + closed source
- 02Linux customizable / Windows not customizable
- 03Linux no licence / Windows licence required
- 04Linux runs months–years without reboot / Windows less reliable
- 05Linux high security / Windows most vulnerable to viruses & malware
- 06Linux installs apps offline / Windows needs internet
- 07Linux case-sensitive / Windows case-insensitive
- 08Linux ease of use improved dramatically / Windows user-friendly
KillCritic Note: This exact question appeared in the 2026 Model Paper as Q19!
A firewall is a network security hardware or software-based device that monitors incoming and outgoing traffic, filtering it based on established security policies.
It essentially acts as a wall that separates a secure internal network from the open internet.
Types of Firewalls
Programs installed on a computer that regulate traffic through applications and port numbers.
Equipment established between your network and the gateway.
A security solution delivered by a cloud provider.
A type that controls data flow by allowing/blocking based on source/destination address and packet structure.
Firewall: The digital wall blocking hackers. Can be Hardware, Software, or Cloud. Uses Packet Filtering to check data packets.
Definition first, then the wall analogy, then all four types with one line each — that is a complete 4-mark answer. Underline “monitors incoming and outgoing traffic”.
Students write only two types. Packet Filtering is also a type and is asked separately in MCQs.
- 01Firewall = hardware or software network security device
- 02Monitors incoming + outgoing traffic
- 03Separates secure internal network from open internet
- 04Types: Software, Hardware, Cloud, Packet Filtering
- 05Appeared as Model Paper 2026 Q19
Network security involves controlling authorization of access to data in a network (assigning IDs or passwords). A specialist implements and maintains these systems.
Responsibilities
NSS (Network Security Specialist): The person who manages passwords, sets up firewalls, installs antiviruses, and stops hackers.
Write the role in one line, then number the six responsibilities. The examiner counts points — four well-written points minimum.
Students describe network security in general and forget the responsibilities. The marks are in the numbered list.
- 01Controls authorization of access to data (IDs / passwords)
- 02Maintains LAN, WAN and server architecture
- 03Safety measures + data recovery plans
- 04Installs and upgrades security software
- 05Firewalls, policies, breach investigation, training
Priority 2: Disk & Storage Management (Crucial Concepts)
Disk partitioning or disk slicing is the creation of one or more regions on a hard disk so an operating system can manage information in each separately.
- It is the first step of preparing a newly manufactured disk before any files or directories are created.
- The disk stores the locations and sizes in a partition table, and each partition appears as a distinct logical part to the OS.
Model Paper Q2: What is the first step of preparing a newly manufactured hard disk? -> Disk partitioning (or slicing). (Matches your Chapter 2 Q5 precisely)
Disk Partition: Slicing a new hard drive into logical parts (stored in a partition table) before adding files.
Mention the alternate name “disk slicing” and the phrase “partition table” — both are keyword marks.
Students confuse Partition, Mount Point, Swap Space and LVM. Partition = dividing the disk into logical regions; it is not a directory and not memory.
- 01Disk partitioning = disk slicing
- 02Creates one or more regions on a hard disk
- 03First step for a newly manufactured disk
- 04Locations and sizes stored in a partition table
- 05Each partition = distinct logical part to the OS
LVM stands for Logical Volume Management.
- It is a storage management solution allowing administrators to divide hard drive space into Physical Volumes (PV).
- These are combined into Volume Groups (VG), which are then divided into Logical Volumes (LV). Mount points and filesystems are created on these Logical Volumes.
LVM (Logical Volume Management): Physical Volumes (PV) -> Volume Groups (VG) -> Logical Volumes (LV).
Draw the PV → VG → LV flow in the answer sheet. A labelled diagram earns the presentation mark.
LVM is not “Linear Volume Management” and not “Logical Valve Manager” — both appear as False statements in the MCQ section.
- 01LVM = Logical Volume Management
- 02PV → VG → LV
- 03Mount points and filesystems created on LVs
- 04Storage management solution for administrators
Swap space is a restricted amount of physical memory allocated by the OS when the RAM has been fully utilized.
- The system releases memory by moving inactive pages to swap space, holding them in virtual memory so the CPU has more RAM available for programs running concurrently.
Swap Space: Emergency virtual memory used when RAM is 100% full.
Use the keywords “physical memory”, “fully utilized RAM”, “inactive pages” and “virtual memory” — the examiner looks for these.
Swap space is not extra RAM hardware — it is disk space used as virtual memory when RAM is full.
- 01Used when RAM is fully utilized
- 02Inactive pages moved to swap space
- 03Held in virtual memory
- 04Frees RAM for concurrent programs
A mount point is simply a directory where filesystems are grafted into the tree, making the device accessible.
- A filesystem is not usable by Linux until it is mounted.
- Example: You might mount the /boot filesystem on a hard drive partition, or a CD-ROM at /media/cdrom.
Mount Point: A folder/directory (like /boot) where a filesystem is grafted into the OS tree to make a device usable.
Always give one example (/boot or /media/cdrom) — examples carry a separate mark in definition questions.
Students confuse Mount Point with Partition — a partition is a region of the disk, a mount point is the directory where that filesystem is attached.
- 01Mount point = directory where filesystems are grafted into the tree
- 02Makes the device accessible
- 03Filesystem unusable until mounted
- 04Examples: /boot, /media/cdrom
KillCritic Note: This was the OR option for Q19 in the 2026 Model Paper!
A shell is a unique program that allows users to interact with OS functions. A shell script is used to execute a range of instructions/commands regularly without entering them manually each time. Files are saved with a .sh extension.
- Uses exactly the same syntax as the command line.
- Writing scripts is much quicker.
- Provides a quick start.
- Allows interactive debugging.
- Prone to costly errors (a single mistake can be harmful).
- Slow execution speed.
- Design flaws in syntax.
- Not well-suited for large/complex tasks.
Shell Scripting: Automating commands in a .sh file. Fast to write but slow to execute and one error can break it.
Define shell first, then shell script, then mention the .sh extension, then give advantages and disadvantages in two lists.
Students write the shell definition only and skip the .sh extension and the advantages/disadvantages — that loses half the marks.
- 01Shell = program to interact with OS functions
- 02Shell script = run a range of commands without typing each time
- 03Saved with .sh extension
- 04Advantages: same syntax, quick to write, interactive debugging
- 05Disadvantages: costly errors, slow, not for complex tasks
It is the regular and necessary upgrades to all systematic and corrective measures to repair and prevent damage to network equipment (like routers and switches).
Includes
- Troubleshooting network resources
- Installing/upgrading hardware and software
- Monitoring network performance
- Securing from threats
- Planning upgrades
- Scheduling backups
- Ensuring compliance with legal regulations
- Updating device configurations
Network Maintenance: Upgrading, repairing, backing up, and securing routers/switches/lines.
Definition in one line, then list at least five of the included activities as bullet points.
Students limit the answer to “repairing the network”. Backups, monitoring and legal compliance are also part of network maintenance.
- 01Regular + corrective measures for network equipment
- 02Routers and switches
- 03Troubleshooting, upgrading, monitoring
- 04Securing, backups, legal compliance
- 05Updating device configurations