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Computer Networks → Routing Algorithms 7

OSPF Type 2 LSA is
Network LSA from DR
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OSPF Type 3 LSA is
Summary LSA from ABR
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OSPF Type 5 LSA is
AS External LSA from ASBR
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OSPF NSSA stands for
Not-So-Stubby Area
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ABR in OSPF stands for
Area Border Router
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OSPF hello interval on broadcast network is
10 seconds
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OSPF dead interval is typically
4x hello
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Computer Networks → Introduction to Computer Networks 28

BGP uses which transport protocol
TCP (port 179)
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iBGP is
BGP for routing within the same AS
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eBGP is
BGP between different ASes
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BGP local preference selects
Outbound exit point from AS
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BGP MED influences
Return traffic preference from neighboring AS
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BGP path selection first attribute is
Weight (Cisco)
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Route reflector in BGP eliminates need for
Full iBGP mesh
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BGP AS path prepending makes route
Less preferred for inbound traffic
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MPLS stands for
Multi Protocol Label Switching
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MPLS label is inserted between
Layer 2 and 3
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LSR in MPLS stands for
Label Switch Router
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LER in MPLS stands for
Label Edge Router
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PHP in MPLS stands for
Penultimate Hop Popping
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MPLS label value 3 (implicit null) triggers
PHP at penultimate hop
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MPLS S-bit indicates
Bottom of label stack
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LDP stands for
Label Distribution Protocol
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MPLS VPN creates per-customer
VRF (Virtual Routing and Forwarding)
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Route distinguisher in MPLS L3VPN makes VPN prefix
Globally unique in BGP
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SDN stands for
Software Defined Networking
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In SDN control plane is
Centralized in SDN controller
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OpenFlow communicates between
SDN controller and network devices
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NFV stands for
Network Function Virtualization
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VNF stands for
Virtual Network Function
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EVPN stands for
Ethernet Virtual Private Network
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QUIC was developed by
Google
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QUIC operates over
UDP
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SCTP stands for
Stream Control Transmission Protocol
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SCTP supports
Multi-homing (multiple IP addresses per connection)
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Computer Networks → Types of Networks 4

VXLAN stands for
Virtual Extensible LAN
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VXLAN uses transport protocol
UDP port 4789
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VXLAN VNI is how many bits
24
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VTEP in VXLAN stands for
VXLAN Tunnel Endpoint
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Computer Networks → Presentation Layer 1

QUIC advantage over TCP+TLS is
0-RTT or 1-RTT handshake reducing connection time
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