Communications and Network Security/Network Devices, Attacks and Perimeter Security. After reading this week’s materials, please respond to one or more of the following questions. Describe the functions of hubs/repeaters, bridges, switches, routers, and gateways. At what layers of the OSI model does each device operate? Describe the following types of network attacks: denial of service (and DDoS), malformed packet attacks, flooding, sniffing, Ransomware, DNS hijacking, and drive-by download. Give an example of a DoS or DDoS attack and describe how it overwhelms a target system. Depending on their needs and budget, companies can choose from a variety of perimeter security options. Discuss the differences between packet-filtering, stateful inspection, proxy, dynamic packet filtering, kernel proxy, and next generation firewalls and how they provide security filtering to protect the perimeter.

    Question 1: Repeaters, Bridges, Switches, Routers, And Entrances

    Repeaters work in the substantial lamina. Their first agency is to recover and recruitment network distinguisheds ordinary from a LAN final cable in their initiatory agency to undivided or further other segments of the wire.  It barely media that repeaters recover the agency of the distinguished antecedently transmission (Oppitz & Tomsu 2018). A network bridge which works in the postulates connect lamina is used to adhere brace compatability of a network and dissect a network into calm sections. The solve whether the communication on the exterior dissect of the notification on postulates packet is entity infections. The routers work in the network lamina, and its scope is to adhere networks to quiet the commerce restrain. The agency of the entrance which works in impression smooth is to synch multitudinous postulates sessions among hosts exchanging postulates and maintenance trustworthy dissecticular impression commands.


    Oppitz, M., & Tomsu, P. (2018). Networks control Sharing and Connecting. In Inventing the Cloud Century (pp. 97-129). Springer, Cham.