Chapter 1: IP and L3 Tech Flashcards

1
Q

How large is the IP Header of an IP Packet?

A
  • between 20 and 60 bytes
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2
Q

What fields are in an IP Header?

A
  • Version
  • Internet Header Length
  • Notification and Explicit Congestion
  • Total Length
  • Identification
  • Flags and Fragment Offset
  • Time to Live
  • Protocol
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3
Q

What does an IP Packet that is only 20 bytes long contain?

A
  • Just the IP Packet Header
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4
Q

What is the largest IP Packet that Ethernet can transport?

A
  • 1500 bytes
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5
Q

What is the Identification field used for?

A
  • used when an IP packet needs to be fragmented due to constraint of Layer 2 (Ethernet) Packet size limits
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6
Q

Which IP Header field provides Quality of Service?

A
  • Notification and Explicit Congestion
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7
Q

What does the TTL field do?

A
  • prevents IP packets from looping indefinitely
    When the TTL goes to zero, the router discards the packet and sends a message to the sender to tell it that the packet was dropped
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