Etisalat Associate Engineer Interview Questions and Answers

Floating routing is a technique used to route traffic between two networks without a direct physical connection.

• It involves creating a virtual interface on each network and configuring them to communicate with each other.

• This can be done using protocols such as GRE or IPsec.

• Floating routing can be useful in scenarios where a direct physical connection is not possible or desirable, such as connecting two data centers.

• Co...read more

Reverse lookup is the process of finding the hostname associated with a given IP address.

• It is commonly used in network troubleshooting.

• It can be performed using the 'nslookup' command in the command prompt.

• Reverse lookup is the opposite of forward lookup, which finds the IP address associated with a given hostname.

Use alternative network troubleshooting methods like traceroute, netstat, nslookup, and checking firewall rules.

• Use traceroute to identify the path taken by packets and locate any network issues.

• Use netstat to check for open ports and connections.

• Use nslookup to verify DNS resolution.

• Check firewall rules to ensure they are not blocking traffic.

• Use packet capture tools like Wireshark to analyze network traffic.

• Check sys...read more

PSTN is a traditional telephone network that uses copper wires to transmit analog voice data.

• PSTN stands for Public Switched Telephone Network

• It is a circuit-switched network that uses analog signals

• It is being replaced by digital networks like VoIP

• Examples of PSTN services include landline phones and fax machines

An IP address is a unique numerical identifier assigned to every device connected to the internet.

• IP stands for Internet Protocol

• IP addresses are used to identify devices on a network

• There are two types of IP addresses: IPv4 and IPv6

• IPv4 addresses are 32-bit numbers and IPv6 addresses are 128-bit numbers

• Example of IPv4 address: 192.168.0.1

• Example of IPv6 address: 2001:0db8:85a3:0000:0000:8a2e:0370:7334

MAC stands for Media Access Control. It is a unique identifier assigned to network interfaces for communication.

• MAC address is a 48-bit address assigned to network devices.

• It is used to identify devices on a network.

• MAC addresses are assigned by the manufacturer and cannot be changed.

• MAC filtering is a security feature that allows or denies access to a network based on MAC addresses.

• Example: 00:1A:2B:3C:4D:5E is a MAC