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Questions and Answers
What is the primary function of a kernel in an operating system?
What is the primary function of a kernel in an operating system?
To control all the tasks that come with a system
What is the purpose of a network interface card (NIC)?
What is the purpose of a network interface card (NIC)?
To connect a computer to a network using an Ethernet cable
What is the main difference between a shell and a kernel?
What is the main difference between a shell and a kernel?
A shell is an interface between the kernel and user, while a kernel is the core of the operating system
What are some common reasons for using networks?
What are some common reasons for using networks?
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What is the function of a hub in a network?
What is the function of a hub in a network?
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What is the purpose of a firewall in a network?
What is the purpose of a firewall in a network?
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What is the role of a modem in a network?
What is the role of a modem in a network?
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What is the server-client architecture in a network?
What is the server-client architecture in a network?
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What is packet routing in a network?
What is packet routing in a network?
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What is a Network Operating System (NOS)?
What is a Network Operating System (NOS)?
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Study Notes
NGFW (Next-Generation Firewall)
- NGFW is a combination of a traditional firewall (FW) and an Intrusion Prevention System (IPS)
- NGFW must include:
- Standard firewall capabilities like stateful inspection
- Integrated intrusion prevention
- Application awareness and control to see and block risky apps
- Threat intelligent sources
- Upgrade paths to include future information feeds
- Techniques to address evolving security threats
Common NGFW Examples
- Firepower 1000 series
- Firepower 2100 series
- Firepower 4100 series
- Firepower 9300 series
Server and Client
- A server is a computer or system that provides resources, data, services, or programs to other computers (clients) over a network (LAN/WAN)
- A client can be a computer, phone, or any device that consumes or generates new data
- A device can be both a server and a client at the same time
Endpoints
- Endpoints are clients that consume or generate new data
- Examples of endpoints include IP phones, web, mobile, and desktop clients
- Endpoints can also refer to end hosts or host devices such as desktops, laptops, mobile phones, and servers
Network Operating System (NOS)
- A NOS is a computer operating system that facilitates connection and communication between autonomous computers over a network
- Examples of NOS include Microsoft Windows Server 2003, Microsoft Windows Server 2008, UNIX, Linux, Mac OS X, Novell NetWare, and BSD
Protocols
- A protocol is a set of rules that governs communication between computers on a network
- Many different types of network protocols and standards are required to ensure communication between computers
- Examples of protocols include:
- File Transfer Protocol (FTP) - port 20, 21
- Secured Shell (SSH) - port 22
- Telnet - port 23
- Simple Mail Transfer Protocol (SMTP) - port 25
- Domain Name System (DNS) - port 53
- Dynamic host configuration protocol (DHCP) - port 67, 68
- Trivial file transfer protocol (TFTP) - port 69
- Hypertext Transfer Protocol (HTTP) - port 80
- Kerberos - port 88
- Post Office Protocol version 3 (POP 3) - port 110
- Network time protocol (NTP) - port 123
- Simple Network Management Protocol (SNMP) - port 161
- Border gateway protocol (BGP) - port 179
- Lightweight directory access protocol (LDAP) - port 389
- Hypertext Transfer Protocol over SSL/TLS (HTTPS) - port 443
- Syslog - port 514
Shell and Kernel
- A shell is an interface between the kernel and the user
- A kernel is the core of an operating system, controlling all tasks that come with a system
Network
- A network is a collection of devices connected together to facilitate communication and resource sharing
- Networks can be small (two computers directly connected) or large (the Internet with millions of devices)
- Networks are used for:
- Information sharing
- File sharing
- Resource sharing
- Application sharing
Computer Network Components
- Hardware components:
- Computer
- Network Interface Card (NIC)
- Media/cables
- Switch/hub
- Router
- Modem
- Firewall
- Software components:
- Network Operating System (NOS)
- Protocol
- Firewall
NIC (Network Interface Card)
- A NIC is a computer expansion card for connecting to a network using an Ethernet cable with an RJ-45 connector
Hub
- A hub is a physical layer networking device that connects multiple devices in a network
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Description
This quiz covers the key features and capabilities of Next-Generation Firewalls, including standard firewall capabilities, intrusion prevention, and application awareness and control.
