The Network layer encapsulates what type of PDU?
Segment
Port numbers are added at which layer?
Transport layer
What packet sequence does TCP use to take down a connection?
FIN, FIN ACK, FIN
What does tracert provide that ping doesn’t?
A list of routers between the source & destinations
What field in the incoming packet does a router use
to forward it to the outgoing interface?
The destination IP address (NOT the MAC address)
What are the four message involved in a
DHCP configuration?
Discover, offer, request, acknowledge
Which cmd commands are based on the ICMP
protocol?
ping, tracert (Trace route)
A MAC address is built from 2 values.
How are they assigned?
Of the 6 bytes that make a MAC address, 3 are the OUI, 3 are the IUI.
OUI is assigned by IEEE, IUI is assigned by the manufacturer
What does arp -a do?
Displays the ARP table
What does arp -d * do?
Deletes the ARP table
Which layer is routing done at?
The network layer
Which application layer uses these protocols: FTP, HTTP, HTTPS, POP3
TCP
Which application layer uses these protocols: TFTP, DNS, DHCP, VoIP
UDP
TTL is a part of which network layer?
Network layer, (part of routing)
2001:0db1:00a3:0000:0000:0000:0000:7334
To compress this IPv6 address we should
Replace all replaceable 0s
What does NAT change when a packet
enters the external/public network?
The source IP address
A PC sends a TCP Window size of 0.
What does this mean?
The PC cannot receive any data
Can a TCP window have an unlimited size?
No, that isn’t a concept in TCP.
A network service provider assigns you a global
routing prefix of 2001:db8:acad::/48. What is the
compressed network address for subnet 10
decimal?
2001:db8:acad:a::/64
