Network Engineer Interview Questions and Answers
Network engineers may work internally as part of an organization’s IT Support team or externally as part of an outsourced IT networking consultancy firm working with a number of clients. Network engineers are responsible for implementing, maintaining, and supporting, developing and designing communication networks within an organization or between organizations. The work however is influenced by the size and sector of the employing organization. Following are some frequently asked Network Engineer interview questions and answers. Make your preparation with these questions and answers before appearing for your interview.
1 Q: What is a DOMAIN? What is the difference between a domain, a workgroup and a homegroup?
A: DOMAIN is created when we install Active Directory. It is a security boundary which is used to manage computers inside the boundary. Domains, workgroups and homegroups represent different methods for organizing computers in networks. The main difference among them is how the computers and other resources on the networks are managed.
2 Q: What is the difference between standard and extended ACL?
A: Standard ACL’s are source based, whereas extended ACL’s are source and destination based. Standard ACL’s can only filter layer 3 network traffic, while extended ACL’s can be used to filter layer 3 and layer 4 as well.
3 Q:. Why do we use routing?
A: By default, a router provides inter network communication only for directly connected networks. To establish communication between indirectly connected networks, we require routing. We can use static or dynamic routing according to topology requirement.
4 Q: What is the difference between switch and hub?
A: The difference between a switch and a hub is that a switch can handle multiple communications between the computers attached to it whereas a hub handle one at a time.
5 Q: What is Remote Access Services?
A: Remote Access Services refers to any combination of hardware and software to enable the remote access to tools or information that typically reside on a network of IT devices.
6 Q: What is the difference between client mail and web mail?
A: An email client is software installed on your computer that is used to access the email server your service uses. Webmail however is a server that you log into over the internet. The email client downloads your emails onto your computer the same way you download any other file from the internet. With webmail, the emails are left on your provider’s servers and that is where they stay unless you delete them. Gmail, yahoo and hotmail are the biggest names in webmail services. Outlook, Incredimail, and thunderbird are email clients that are installed on the computer and used to access email.
7 Q:. What is the difference between firewall and antivirus software?
A: A firewall is a filtering device. This filtering can be either built in or user defined. It controls incoming traffic usually by rules created by the firewall administrative to prevent invasive probing and attacks to the servers, PCs and other devices on your local or wide area network. Antivirus software is usually a scanning software with a subscription service that provides the scanner virus definitions allowing it to search files,incoming,outgoing,and stored on hard drives and other storage devices which can be potentially hazardous to your internal network or PC.
8 Q:. What is the difference between dialup and broadband?
A: A broadband connection provides high speed internet access over a standard phone line. The advantage of a broadband connection over a standard dial up service, is that Broadband is considerably faster and is always on meaning that once you are logged on, your PC is online until the PC is turned off again. Broadband offer high speed internet access and allows telephone calls and a permanent internet connection to share a single phone line simultaneously whereas in Dialup connection either internet connection or telephone call can be made at given time.
9 Q:. What is Spam guard?
A: Spam guard helps radically reduce the amount of spam you receive in your inbox by diverting most of it to your bulk mail folder. Spam guard constantly updates itself to recognize and deflect more spam each day. When turned on, emails that are sent out in bulk are delivered to your bulk mail folder and are deleted after 30 days.
10 Q: What is NIC?
A: A network card, network adapter or NIC (network interface controller) is a piece of computer hardware designed to allow computers to communicate over a computer network. A network interface card provides the computer with a dedicated full time connection to a network. Personal computers and workstations on a local area network typically contain a network interface card specifically designed for the LAN transmission technology.