CCENT 1.3 Describe the impact of infrastructure components in an enterprise network

What is the difference between hardware and software firewalls?

A firewall can be a hardware or software device. A hardware firewall is a unit that is connected between the network and the device for connecting to the Internet. A software firewall is a program that is installed on the computer with the Internet connection. Similarly, there are computers with specific software programs that are placed behind the router and whose only function is to provide the network firewall.

What is a firewall?

A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. Firewalls have been a first line of defense in network security for over 25 years. They establish a barrier between secured and controlled internal networks that can be trusted and untrusted outside networks, such as the Internet. A firewall can be hardware, software, or both.

AP

Access Point. (a networking hardware device that allows a Wi-Fi device to connect to a wired network.)

Is a wireless router the same as an access point?

Access Points are still used in many networks they are used to help with WiFi dead spots and extending a wireless network. Most anyone who has a internet connection has a router. A router is a network device that can transfer data wirelessly or wired. A router can be a access point but a access point cant be a router.

ASA

Adaptive Security Appliances. (A security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities. It provides proactive threat defense that stops attacks before they spread through the network.)

AMP

Advanced Malware Protection (Visibility and control to defeat advanced attacks. Get global threat intelligence, advanced sandboxing, and real-time malware blocking to prevent )

DPI

Deep Packet Inspection (an advanced method of examining and managing network traffic. It is a form of packet filtering that locates, identifies, classifies, reroutes or blocks packets with specific data or code payloads that conventional packet filtering, which examines only packet headers, cannot detect.)

How does a firewall function?

Generally the firewall has two network interfaces: one for the external side of the network, one for the internal side. Its purpose is to control what traffic is allowed to traverse from one side to the other. As the most basic level, firewalls can block traffic intended for particular IP addresses or server ports.

How does a firewall work?

How Firewalls Work. A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. If an incoming packet of information is flagged by the filters, it is not allowed through. Software Firewalls. ... Additionally, software firewalls may also incorporate privacy controls, web filtering and more. The downside to software firewalls is that they will only protect the computer they are installed on, not a network, so each computer will need to have a software firewall installed on it.

What is a wireless access point?

In computer networking, a wireless access point (WAP), or more generally justaccess point (AP), is a networking hardware device that allows a Wi-Fi device to connect to a wired network. ... An AP is differentiated from a hotspot, which is the physical location where Wi-Fi access to a WLAN is available

LWAPP

Lightweight Access Point Protocol (protocol that can control multiple Wi-Fi wireless access points at once. This can reduce the amount of time spent on configuring, monitoring or troubleshooting a large network)

Do firewalls protect against hackers?

Like network firewalls, application firewalls protect your application. ... However, anti-virus and firewalls aren't the only ways to protect yourself against hack attacks.Hackers don't just attack through malware or trojans and they don't just attack through accessing your network or web app.

LAN

Local Area Network (a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building.)

NGFW

Next Generation Firewall. (A next generation firewall combines a traditional firewall with other network device filtering functionalities, such as an application firewall using in-line deep packet inspection (DPI) and an intrusion prevention system (IPS) among others.)

NGIPS

Next Generation Intrusion Prevention System. (Advanced threat protection addressing known and unknown threats through fully integrated advanced malware protection (AMP) and sandboxing solutions. Rapidly detect, block, contain, and remediate advanced threats.)

What does a firewall protect you from?

Other firewalls provide less strict protections, and block services that are known to be problems. Generally, firewalls are configured to protect against unauthenticated interactive logins from the ``outside'' world. This, more than anything, helps prevent vandals from logging into machines on your network.

How do you set up an access point?

Simply connect the access point to one of the ports of your existing wired/wirelessrouter then configure the access point's wireless settings. Step 1: Open the access point's web-based setup page by entering the default IP Address "192.168.1.245" on the Address bar then press [Enter].

VPN

Virtual Private Network (xtends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.)

Wi-Fi

a wireless networking protocol that allows devices to communicate without internet cords.

Access points

allow wireless devices to connect to a wired network. The access point itself connects to the network via a wired connection. It acts similar to a switch where it trunks all traffic over the wired connection to an upstream switch. Wireless devices connect wirelessly to the access point and can be segregated from each other. a device that creates a wireless local area network, or WLAN, usually in an office or large building. An access point connects to a wired router, switch, or hub via an Ethernet cable, and projects a Wi-Fi signal to a designated area. For example, if you want to enable Wi-Fi access in your company's reception area but don't have a router within range, you can install an access point near the front desk and run an Ethernet cable through the ceiling back to the server room.

wireless router

connects a group of wireless stations to an adjacent wired network. Conceptually, a wireless router is a wireless AP combined with an Ethernet router. forwards IP packets between your wireless subnet and any other subnet.

Switches

connects devices together and transmits layer 2 packets between them.

Routers

connects devices together and transmits layer 3 packets between them.

IPS

intrusion prevention system (a device or software application that monitors a network or systems for malicious activity or policy violations.)

Wireless Controllers

net admins use these to manage many different access points. When access points are configured to pull their configuration from a wireless controller they are called lightweight access points. A wireless controller can manage a large number of access points at once, which reduces the amount of management overhead required. Used in combination with the Lightweight Access Point Protocol (LWAPP) to manage light-weight access points in large quantities by the network administrator or network operations center. The wireless LAN controller is part of the Data Plane within the Cisco Wireless Model.

What does a wireless controller do?

used in combination with the Lightweight Access Point Protocol (LWAPP) to manage light-weight access points in large quantities by the network administrator or network operations center.

WAP

wireless access point. (a hardware device or configured node on a local area network (LAN) that allows wireless capable devices and wired networks to connect through a wireless standard, including Wi-Fi or Bluetooth.)

Types of firewalls

• Packet filtering firewalls. • Circuit-level gateways. • Stateful inspection firewalls. • Application-level gateways. • Next-gen firewalls.