9 Network Services And Management

Network and Data Communications · Unit 9

Network Services and Management

Exam-focused notes for Network Services and Management (Network and Data Communications, BIT254): what the TU syllabus asks and how it has actually been tested, with 6 solved past questions from this unit.

What this unit covers

  • DNS domain name resolution
  • DNS recursive resolution
  • DNS iterative resolution
  • DNS caching
  • DHCP protocol
  • DNS vs DHCP differences
  • NAT definition and types
  • Network Address Translation
  • POP protocol

DNS domain name resolution

20825 marks

What is DHCP? Explain DNS name resolution process with suitable example. [1+4]

--- DHCP (Dynamic Host Configuration Protocol) is a network management protocol used to automatically assign IP addresses and other network configuration parameters (such as subnet mask, default gateway, and DNS server address) to devices on a network, so t...

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20815 marks

What is the major purpose of DNS? Explain how DNS resolve its domain name. [5]

The major purpose of DNS (Domain Name System) is to translate human-readable domain names into machine-readable IP addresses (and vice versa). Since computers communicate using numerical IP addresses (e.g., 192.168.1.1), but humans find it easier to remembe...

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DNS vs DHCP differences

20805 marks

What is the difference between DNS and DHCP? Explain with example [5]

--- DNS is a naming system that translates human-readable domain names into IP addresses so that computers can locate each other on a network. - It works like a phone book of the internet. - It operates on Port 53 using UDP/TCP. - It is a hierarchical, dist...

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DNS recursive resolution

20805 marks

Explain recursive resolution. What are its advantages? [5]

Recursive resolution is a name resolution strategy used in the Domain Name System (DNS) where a DNS resolver takes full responsibility for resolving a query on behalf of the client. Instead of referring the client to another server, the resolver queries oth...

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05 marks

Briefly explain recursive resolution, iterative resolution and caching [5]

Note: No specific curriculum notes were found for this topic. The following answer is based on standard DNS and name resolution concepts as taught in networking courses. --- In recursive resolution, the client places the full burden of resolving a name on t...

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NAT definition and types

20795 marks

Why do we use NAT? Explain its different types [5]

NAT (Network Address Translation) is a technique used in networking for the following reasons: 1. IPv4 Address Conservation: The primary reason is to conserve the limited pool of public IPv4 addresses. Multiple devices on a private network can share a singl...

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