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
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...
Full solved answer →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...
Full solved answer →DNS vs DHCP differences
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...
Full solved answer →DNS recursive resolution
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...
Full solved answer →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...
Full solved answer →NAT definition and types
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...
Full solved answer →Make Unit 9 stick
Practice BIT254 with flashcards & quizzes