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CCNP Practice questions

 Question: What is the purpose of the Spanning Tree Protocol (STP)?

Answer: The purpose of the Spanning Tree Protocol (STP) is to prevent loops in a network. STP is used in Ethernet networks to ensure that there is only one active path between two endpoints. This helps to prevent the occurrence of broadcast storms, which can cause significant network downtime. STP accomplishes this by using a calculation algorithm to determine the best path to take, and then disabling any redundant paths.

Question: What is the difference between a switch and a router?

Answer: A switch is a networking device that connects devices together on a local area network (LAN). It operates at the data link layer (layer 2) of the OSI model and is responsible for forwarding data frames between connected devices. A router, on the other hand, operates at the network layer (layer 3) of the OSI model and is responsible for forwarding packets between different networks. In addition to its forwarding capabilities, a router also performs functions such as routing table management, network address translation (NAT), and quality of service (QoS).

Question: What is the purpose of an access control list (ACL)?

Answer: An access control list (ACL) is a set of rules that defines what types of traffic are allowed or denied on a network. ACLs are used to secure networks by controlling the flow of incoming and outgoing traffic. They are often used to restrict access to sensitive network resources or to prevent certain types of traffic from entering or leaving the network. ACLs can be implemented on routers, switches, or firewalls and are typically used in conjunction with other security measures such as firewalls and virtual private networks (VPNs).

Question: What is the difference between a Class A, Class B, and Class C IP address?

Answer: Class A, Class B, and Class C IP addresses are different classes of IP addresses that are used to define the size of a network and the number of hosts that can be connected to it.

A Class A IP address is a network address that can accommodate up to 126 networks and up to 16,777,214 hosts.

A Class B IP address can accommodate up to 16,384 networks and up to 65,534 hosts.

A Class C IP address can accommodate up to 2,097,152 networks and up to 254 hosts.

The choice of IP address class depends on the size of the network and the number of devices that need to be connected to it.

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