Cloud computing has the capability to meet increased and decreased demands for computing infrastructure for a short period of time.Which of the following best describes this characteristic?
Answer(s): B
Elasticity in cloud computing refers to the ability of the system to automatically scale resources up or down based on demand. This capability allows organizations to handle short-term fluctuations in workload without over-provisioning or underutilizing resources. For example, during a high-traffic event, the cloud can add resources temporarily, and once the demand decreases, it scales them back down.
Which of the following can also provide a security feature when implemented?
Answer(s): A
Network Address Translation (NAT) can provide a security feature by hiding the internal IP addresses of a network from external entities. NAT translates private IP addresses into a public IP address (or a smaller pool of public IPs) for internet access. This makes it harder for external attackers to directly target internal devices since their private IPs are not exposed.
Which of the following best describes the transmission format that occurs at the transport layer over connectionless communication?
At the transport layer, connectionless communication (as used by protocols like UDP - User Datagram Protocol) operates with data units called datagrams. Datagrams are self-contained, independent packets that carry enough information for routing from the source to the destination without the need for an established connection.
Which of the following is most likely to work with an FC connection and offers more scalability?
SAN (Storage Area Network) is most likely to work with an FC (Fibre Channel) connection and offers greater scalability. SANs use high-speed networks, often employing Fibre Channel, to provide block-level storage to servers. This setup is highly scalable, allowing organizations to add more storage capacity or devices as needed while maintaining performance and flexibility.
A company is moving to a hybrid cloud model. As part of this move the mail server will be moved to the cloud. The systems administrator needs to ensure the mail server continues to receive email.Which of the following types of DNS records should the systems administrator update?
Answer(s): C
MX (Mail Exchange) records in DNS specify the mail servers responsible for receiving emails for a domain.When moving the mail server to the cloud, the systems administrator must update the MX record to point to the new mail server's hostname or IP address in the cloud. This ensures that email traffic is routed correctly to the new server.
A network engineer is configuring network ports in a public office. To increase security, the engineer wants the ports to allow network connections only after authentication.Which of the following security features should the engineer use?
802.1X is a network access control protocol that provides port-based authentication. It ensures that only authenticated devices can connect to the network through a switch or access point.When implemented, 802.1X requires devices to authenticate using credentials, such as usernames and passwords, or certificates before granting access to the network.
A network administrator is expanding a network and wants to ensure no unauthorized redundant links are present.Which of the following should the administrator use to identify and block redundant links?
Spanning Tree Protocol (STP) is specifically designed to prevent loops in a network with redundant links. It identifies redundant paths and places them into a blocking state, ensuring only one active path is used at a time. This prevents network issues such as broadcast storms caused by loops.
A network administrator notices uncommon communication between VMs on ephemeral ports on the same subnet. The administrator is concerned about that traffic moving laterally within the network.Which of the following describes the type of traffic flow the administrator is analyzing?
East-west traffic refers to the communication that occurs between devices or systems within the same data center or subnet, such as virtual machines (VMs) communicating with each other. This type of traffic is distinct from north-south traffic, which involves communication between internal systems and external networks or clients. The administrator's concern about traffic moving laterally aligns with the concept of east-west traffic, as it involves internal, intra-network communication.
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