How do you use the $_POST superglobal in PHP?
- Access the data using the $_POST['key'] syntax.
- Access the data using the $_POST->$key syntax.
- Access the data using the $_POST[key] syntax.
- Access the data using the $_POST->key syntax.
To use the $_POST superglobal in PHP, you can access the submitted form data by using the $_POST['key'] syntax. The 'key' corresponds to the name attribute of the form input. For example, to access the value of an input field with name="username", you would use $_POST['username']. This allows you to retrieve and process the data submitted via an HTML form using the POST method. Learn more: https://www.php.net/manual/en/reserved.variables.post.php
PHP supports eight primitive data types.
- TRUE
- FALSE
This statement is true. PHP supports eight primitive data types: integer, float, string, boolean, null, array, object, and resource. These data types are the building blocks for storing and manipulating data in PHP. Each data type has its own characteristics and uses. Learn more: https://www.php.net/manual/en/language.types.intro.php
What is the difference between a site-to-site VPN and a remote access VPN?
- Site-to-Site VPNs connect entire networks, while Remote Access VPNs connect individual users to a network.
- Site-to-Site VPNs use SSL/TLS encryption, while Remote Access VPNs use IPSec.
- Site-to-Site VPNs are only suitable for small organizations, while Remote Access VPNs are suitable for large enterprises.
- Site-to-Site VPNs are always faster than Remote Access VPNs.
A site-to-site VPN connects entire networks, allowing multiple users to access the network, while a remote access VPN connects individual users to a network.
In a network setup, which device is used to filter and forward packets between LAN segments based on MAC addresses?
- Bridge
- Hub
- Router
- Switch
A bridge is used to filter and forward packets between LAN segments based on MAC addresses in a network setup.
The technique of _________ can help in optimizing the performance of a network by reducing the number of individual routes advertised.
- BGP
- OSPF
- Route Redistribution
- Route Summarization
The technique of route summarization can help optimize network performance by reducing the number of individual routes advertised, leading to more efficient routing tables.
What is a fundamental characteristic of PPP that distinguishes it from other data link layer protocols?
- Connection-oriented
- Connectionless
- Both
- Neither
A fundamental characteristic of PPP is that it is connection-oriented, distinguishing it from other data link layer protocols.
_________ is a common SDN framework that allows direct programmable control of the network.
- OpenFlow
- SNMP
- BGP
- OSPF
OpenFlow is a common SDN framework that allows direct programmable control of the network.
The ________ record in DNS is used to redirect one domain to another domain.
- CNAME
- MX
- A
- PTR
The CNAME (Canonical Name) record in DNS is used to redirect one domain to another domain. It is commonly used for creating aliases or redirects in the DNS system.
Which type of firewall examines network traffic based solely on IP addresses and ports?
- Stateful firewall
- Proxy firewall
- Packet-filtering firewall
- Application-layer firewall
A packet-filtering firewall examines network traffic based solely on IP addresses and ports.
When using VLSM, which of the following is a key advantage over traditional subnetting methods?
- Easier implementation
- Efficient use of IP addresses
- Faster network speeds
- Improved security
VLSM allows for the efficient use of IP addresses by allocating variable-sized subnets, optimizing address space usage.
During a network expansion, an additional switch is added. The network team wants to ensure this switch never becomes the root bridge in the STP topology. What configuration should be applied?
- Changing MAC Address
- Enabling PortFast
- Increasing Switch Priority
- Lowering Switch Priority
To prevent a switch from becoming the root bridge in the STP topology, the network team should lower the switch priority for that particular switch.
Which network automation tool is known for its agentless architecture and use of playbooks?
- Ansible
- Puppet
- Chef
- SaltStack
Ansible is known for its agentless architecture and use of playbooks to define automation tasks in a declarative language.