Friday, October 5, 2018

What do you need to know to get an Entry level Help Desk Position?

Many college graduates that went for an IT degree usually do not know how to pass the interview for an entry-level position in the IT field simply because they do not know what kind of technical question that hiring manager will be asking. Today I am going to show you some of the questions that many hiring managers (not all) will ask when interviewing for a position as an Entry Level Help Desk

These questions will not only help you with your interview, but it will also let the hiring manager knows how much knowledge you have gained in the IT field. See below for some of the questions that are asked the most when interviewing for an Entry Level Help Desk position.

1. What is the difference between a hub, a switch and a router?

A hub is typically the least expensive, least intelligent, and least complicated of the three. Its job is very simple. Anything that comes in one port is sent out to the others. And when computer "A" responds, its response also goes out to every other port on the hub

A switch does essentially what a hub does, but more efficiently. By paying attention to the traffic that comes across it, it can "learn" where particular addresses are, it knows where the message came from so it sends through that port.

A router is a device that forwards data packets to ports of a computer network.
What is a network?

2. What is Active Directory?

AD is a tool or software that helps manage groups/users forest. Active Directory provides a central location for network administration and security using GPOs.

3. What is TCP/IP and what does it stands for?

TCP/IP is the communication protocol for communication between computers on the Internet.
TCP/IP stands for Transmission Control Protocol / Internet Protocol. TCP/IP defines how electronic devices (like computers) should be connected to the Internet, and how data should be transmitted between them.

4. What is a default gateway?

The exit-point from one network and entry-way into another network, often the router of the network

5. What is an IP Address?

Every machine on a network has a unique identifier. This number is an exclusive number all information technology devices (printers, routers, modems, et al) use which identifies and allows them the ability to communicate with each other on a computer network

6. What is the significance of the IP address

The limited broadcast address is utilized when an IP node must perform a one-to-everyone delivery on the local network but the network ID is unknown.

7. What are the three major classes of an IP Network?

Address First Octet in Decimal High-Order Bits
Class A
1 - 126
Class B
128 - 191
Class C
192 - 223

8. What is a class D IP address?

Address First Octet in Decimal High-Order Bits
Class D
224 - 239

9. What is OSPF?

OSPF (Open Shortest Path First) is a router protocol used within larger autonomous system networks in preference to the Routing Information Protocol (RIP), an older routing protocol that is installed in many of today's corporate networks. Open Shortest Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the interior gateway protocol (IGP) working group of the Internet Engineering Task Force (IETF). .OSPF has two primary characteristics. The first is that the protocol is open, which means that its specification is in the public domain. The OSPF specification is published as Request For Comments (RFC) 1247. The second principal characteristic is that OSPF is based on the SPF algorithm, which sometimes is referred to as the Dijkstra algorithm, named for the person credited with its creation.

10. What is ARP?

Address Resolution Protocol (ARP), is a network layer protocol used to convert an IP address into a physical address

11. A user is complaining of delays when using the network. What would you do?

First try to get the user to identify what network resource is slow (email, external web browsing, intranet, network file access, etc.) Also have the user swap locations with another coworker to identify if the problem lies in the hardware (computer, network cable, switch port, etc.) that is specific to that location.

12. What does DNS stand for and what is the purpose of it?

DNS stands for Domain Name Server or Service. DNS is an internet protocol and the main purpose of DNS is to translate domain names into IP addresses.

13. What is a DNS server?

A DNS server resolves IP addresses. TCP/IP uses IP addresses to communicate, and a DNS server resolves objects to IP addresses for all the transmission based items your network needs to communicate with, like PC's, servers, printers, etc.

14. What is a Domain Controller?

A Domain Controller holds all of the information about everything in your network. Things like permissions; security groups; ACLs; user information; and the structure of your network

15. What does DHCP stand for and what does it do?

Dynamic Host Configuration Protocol, the main purpose for this is to automatically assign different IP addresses to devices on a network. For example network, Admin has to assign IP addresses when a user connects to the internet through a machine.

16. What does HTTP stand for and what does it do?

HTTP stands for Hyper Text Transfer Protocol and it is a protocol that web browsers and web servers use to communicate with each other over the internet

17. Describe Packet traveling

The packet would have to pass through a switch and two routers to get a to another computer ones it goes through the switch the routing tables would determine which path to take.

18. Describe the NETSTAT command (what it does and what it can show you)

The NETSTAT command will show you whatever ports are open or in use, but it is NOT a port scanning tool.

19. Describe Flexible Single-Master Operation (FSMO)

Flexible Single-Master Operation (FSMO) roles, manage an aspect of the domain or forest, to prevent conflicts. There are 5 different FSMO roles.

20. What is Organization Unit?

A particularly useful type of directory object contained within domains is the organizational unit helps you set up you can assign Group Policy settings or delegate administrative authority.

21. What is a subnet mask?

A subnet mask allows you to identify which part of an IP address is reserved for the network, and which part is available for host use. If you look at the IP address alone, especially now with classless inter-domain routing, you can't tell which part of the address is which. Adding the subnet mask, or netmask gives you all the information you need to calculate network and host portions of the address with ease. In summary, knowing the subnet mask can allow you to easily calculate whether IP addresses are on the same subnet, or not.

22. What is a subnet?

A subnet is a logical organization of network address ranges used to separate hosts and network devices from each other to serve a design purpose. In many cases, subnets are created to serve as physical or geographical separations similar to those found between rooms, floors, buildings, or cities.

23. What is a Domain?

A domain is a unique address that can be used on the internet.


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