Network Engineer Interview Preparation (Part - 6)

Welcome back, everyone! Today, we are excited to kick off a new journey focused on preparing for network engineer interviews. This will be a complete series designed to help our subscribers, featuring 100 articles. This is the 6th article in the series. To stay updated and receive notifications for future posts, be sure to subscribe!

51. What is the difference between unicast, multicast, and broadcast communication?

Unicast communication involves sending data from one sender to one receiver. Multicast communication sends data from one sender to multiple receivers who have joined a multicast group. Broadcast communication sends data from one sender to all devices on a network.

52. What is the purpose of a network tap?

A network tap is a device that allows monitoring and capturing network traffic for analysis or security purposes without interrupting the flow of traffic.

53. What is the purpose of a network cache?

A network cache stores frequently accessed data or content closer to the user, reducing the time and bandwidth required to retrieve it from the original source.

54. What is a routing table?

A routing table is a data structure stored in a router that contains information about network destinations and the best paths to reach them.

55. What is the purpose of an access control list (ACL)?

An access control list (ACL) is a set of rules or filters applied to a router or firewall to control network traffic based on specified criteria, such as source/destination IP addresses, ports, or protocols.

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56. What is the difference between symmetric and asymmetric encryption?

Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption uses different keys: a public key for encryption and a private key for decryption.

57. What is a network segment?

A network segment refers to a portion of a network that is separated from the rest by devices such as switches, routers, or VLANs. It may have its own set of rules or policies.

58. What is the purpose of a network IDS/IPS?

A network Intrusion Detection System (IDS) or Intrusion Prevention System (IPS) monitors network traffic for suspicious or malicious activity, alerting administrators or taking automated actions to prevent unauthorized access or attacks.

59. What is a network gateway protocol?

A network gateway protocol is a routing protocol used by routers to exchange routing information with routers in other autonomous systems. Examples include BGP, EIGRP, and OSPF.

60. What is the purpose of a network monitoring tool?

A network monitoring tool collects and analyzes network data to track performance, detect issues, and provide insights into the health and usage of a network.

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