3 - VPN Flashcards
1
Q
VPN
A
Virtual Private Network,
Provides access to secure private networks
2
Q
VPN Protocols
A
PPTP (Point to point)
- obsolete
L2F (Layer 2 Forwarding)
L2TP (L2 Tunnelling)
IPSec
3
Q
VPN Encryption Tunnel Mode
A
- protects packet from header to payload
- more resources but useful if destination should be hidden
4
Q
VPN Encryption Transport Mode.
A
- only protects payload
- doesn’t conceal endpoint identity
5
Q
Software VPN Advantages
A
- Easy install
- Decent conneciton speed
- Portable
6
Q
Software VPN Disadvantages
A
- Difficult to configure
- VPN Server is exposed
7
Q
Hardware VPN Advantages
A
- Designed for routing
- Designed for good security
- Big network organisations
8
Q
Hardware VPN Disadvantages
A
- Cost
- CHecking compatibility with other devices
9
Q
IPSec services examples
ACDRC
A
- Access control
- COnnectionless integrity
- Data origin authentication
- Rejection of replayed packets
- Confidentiality
10
Q
IPSec Packet
A
IP Header
IPSec Header
Secure IP Payload
11
Q
IPsec VPN negotiation
A
A and B
1. A sends traffic to B
2. RouterA and RouterB negotiate an IKE Phase 1 session
3. Then an IKE Phase 2 session
4. Info exchanged via IPsec tunnel
5. tunnel terminated
