N10-009 topics: network topologies, cloud connectivity models, firewalls, attacks, hardening and secure protocols.
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- In a mesh topology, how is each node connected?
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Each node is directly connected to multiple other nodes, creating redundant paths.- What is the main advantage of a star topology?
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Failure of one node does not disable the entire network because all traffic goes through a central switch or hub.- In a ring topology, what happens when one link fails?
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The entire network can fail unless the ring has a dual-ring or ring-with-bypass design.- What is a hybrid topology?
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A combination of two or more basic topologies, such as star-mesh or star-ring, to meet specific network requirements.- What is the main disadvantage of a mesh topology?
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High cost and complexity due to the large number of physical connections and cables required.- Define a public cloud.
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A cloud infrastructure shared by multiple organizations, hosted by a third-party provider and accessible over the internet.- Define a private cloud.
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A cloud infrastructure dedicated to a single organization, either on-premises or hosted by a provider exclusively for that organization.- What is a hybrid cloud?
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A combination of public and private cloud resources that are integrated or coordinated to allow workload portability.- What is a community cloud?
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A cloud infrastructure shared by organizations with common interests or requirements, managed jointly or by a third party.- What is the primary advantage of a public cloud?
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Lower cost, scalability, and minimal management overhead because the provider handles all infrastructure.- What is a stateful firewall?
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A firewall that tracks the state of network connections and allows return traffic automatically for established sessions.- What is a stateless firewall?
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A firewall that examines individual packets without tracking connection state and requires rules for both inbound and outbound traffic.- What is a UTM firewall?
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A unified threat management firewall that combines multiple security functions such as antivirus, anti-spyware, intrusion detection, and content filtering.- What does packet filtering accomplish?
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It examines packet headers and permits or denies traffic based on source and destination IP addresses and ports.- What is NAT in the context of firewalls?
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Network Address Translation masks internal IP addresses by translating them to a single public IP address, providing a layer of security and address conservation.
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