Networks and Communications Security Case Study Answer

Networks and Communications Security Week 5

In this article i am gone to share Coursera Course: Networks and Communications Security | Peer-graded Assignment: Networks and Communications Security Case Study Answer with you.

 

Peer-graded Assignment: Networks and Communications Security Case Study Answer

Peter O’Day, Manager, Technical and Communications, needs you to set up a secure communications infrastructure with a perimeter based firewall. What is needed to deploy an effective firewall?

First to deploy Any Device in network you know where to put device in network infrastructure firewall can be put before or after router .

  • Policy required
  • Some training required
  • Monitoring skill required
  • Change control knowledge required

Why is a switch preferable to a hub even though it costs more?

  • A switch is more efficient at passing along traffic with better traffic management.
  • Switch can allow multiple simultaneous packet deliveries from different sources to different receivers.
  • VLAN can be created in switch and there is ability to isolate the traffic

Why is the use of CAT5e cable better than the use of Fiber? What are the disadvantages of UTP (Unshielded Twisted Pair)?

CAT5e also call Ethernet , Unshielded twisted pair cable.

Advantages:

  1. it is cheaper
  2. Low bandwidth but good for networking
  3. Easy to install
  4. Easy to maintain
  5. Speed is low ..

Disadvantages:

  1. Not Secure .
  2. More Susceptible for sniffing and Electro magnetic interference (EMI).

Match the protocols to their correct layer of the OSI stack. For protocols that operate at multiple layers, choose the layer at which the protocol first is used:

httpDataLink
ipsecSession
UDPDataLink
ICMPNetwork
FrameTCP Transport
TCPDataLink
IPICMP Network
ARPTransport
PPTPNetwork
PPPApplication
ProtocolOSI Layer
httpApplication
ipsecNetwork
UDPTransport
ICMPNetwork
FrameDataLink
TCPTransport
IPNetwork
ARPDataLink
PPTPSession
PPPDataLink

Match these common services to their correct port:

Smtp161/162
http69
TLS67/68
ftp110
DNS23
telnet53
pop20/21
DHCP443
TFTP80
SNMP25
TLS443
Smtp25
http80
ftp20/21
DNS53
telnet23
pop110
DHCP67/68
TFTP69
SNMP161/162

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