Networking & Security

Made By:Ashish Sharma

NEC

Topics

Networks

Network Devices

Network Security

Internet Security

Application Security

Types Of Networks

• LAN: Local Area Network

For Small Business• MAN: Metropolitan area network

For Cities or Campus• WAN: Wide Area Network

Regional or National Networks

Devices Used By Networks

• Bridges (Old type of Switches)

• Switches (For LAN basically connect Systems)

• Routers (For inter- network communication)

Interfaces for these DevicesConsole Interface

GUI Interface

Network Certifications

Key Players in Network Certifications:

• Cisco (CCNA, CCNP)

• Juniper (JNCIA, JNCIE,JNCIP, JNCIS)

• Microsoft ( MCSE, MCSA)

Classification Of Cisco Exams

• Routing and Switching Certification Exams• Data Center Certification Exams• Return to Top• Design Certification Exams• Security Certification Exams• Storage Networking Certification Exams• Voice Certification Exams• Wireless Certification Exams

Cisco Exams• CCENT Cisco Certified Entry Networking Technician

(ICND1) : Connecting Devices (1Exam)

• CCNA Cisco Certified Network Associate (ICND1+ ICND2) :Routing and Switching (1Exam)

• CCNP Cisco Certified Network Professional To plan, implement, verify and troubleshoot networks

(3Exams)

• CCIE Cisco Certified Internetwork Expert More Complex Network (9Exams)

Juniper Exams

• JNCIA - Juniper Networks Certified Internet Associate (10 exams)

• JNCIP - Juniper Networks Certified Internet Professional (8 exams)

• JNCIE - Juniper Networks Certified Internet Expert (6 exams)

• JNCIS - Juniper Networks Certified Internet Specialist (13 exams)

Network Operating System• A networking operating system (NOS), also

referred to as the Dialoguer, is the software that runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions.

• Cisco: Cisco IOS (Internetwork Operating System) (C/C++)

• Juniper: JUNOS (C/C++)

Types Of Security

• Internet Security (In between Client and Server)

• Network Security (Inside the Network)

• Application Security( Application SDLC)

Internet Security• Network Layer Security: By Cryptography on TCP/IP including

SSL & TLS.

• IPsec Protocol: Including Authentication Header & Encapsulating Security payload.

• Security Token: Online Sites Providing 6-digit code changing randomly in 30-60 Sec.

• Electronic Mail security (Email): Using PGP (Pretty Good Privacy) for encrypting.

• Message Authentication Code: Encrypting message by using Code.

•Firewalls: Screening Network Traffic

Types of Firewalls

•Packet Filters: Processing Data Packet by Packet

•Circuit-Level Gateways: Operates at network level

•Application-Level Gateways: Operates at application level.

• Malicious Software & Antivirus

• Malware: User is tricked to download a software

• Virus: Code to steal data

• Trojan Horse: Pretends as secure but malicious (Keygen)

• Spyware: Monitor Activites

Application Security• Measures taken throughout application life-

cycle to prevent flaws in Security Policies.Includes• Input Validation• Authentication• Authorization• Configuration Mgmt.• Exception Management• Logging

Network Security

It consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network.

Key Things:

Policies, Administrator, monitor, network,misuse, modification

Security Management• Firewall• Antivirus• Wireless: WEP/WPA/WPA2• MAC Adress Filtering• Assign Static IP Address• Password changing on regular basis• Awareness program• Network Analyzer

Attacks To Be Prevented

• DoS Attack• Spoofing• Man in the Middle• SQL Injection

Thanks

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