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The Bits and Bytes of Networking > Traceroute > Flashcards

Traceroute Flashcards

1
Q

what is a utility that lets you discover the path between two nodes, and gives you informations about each hop along the way?

A

Traceroute

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2
Q

what command lets me determine if I can reach a computer from another one?

A

ping

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3
Q

what command lets me understand the general quality of a connection?

A

ping

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4
Q

why do I need traceroute?

A

to determine where in a long series of node hops a problem is.

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5
Q

What utility works by a manipulation of the TTL field at the iP level?

A

Traceroute

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6
Q

What is decremented by one every router that forwards a packet?

A

TTL field

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7
Q

What happens when a TTL field is 0?

A

packet is discarded

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8
Q

When is a ICMP time-exceeded message sent back to the originating host?

A

When the TTL field reaches 0.

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9
Q

What utility uses the TTL field by first setting it to 1 for the first packet then 2 for the 2nd, 3 for the 3rd, and so on?

A

traceroute

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10
Q

What utility can make sure the first packet sent will be discarded by the first router hop, so it gets back an ICMP time-exceeded message?

A

Traceroute

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11
Q

How long will Traceroute continue?

A

Until the packet reaches its destination.

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12
Q

What does Traceroute do for each hop? How many packets?

A

Traceroute sends three identical packets for each hop.

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13
Q

What command output lets me see the number of the hop and the round trip time for all three packets, IP of the device at each hop, and a host name if it can resolve one?

A

Traceroute

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14
Q

What does Traceroute do on linux and MacOS?

A

sends UDP packets to very high port numbers.

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15
Q

What is the shortening of the command name in Windows?

A

tracert

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16
Q

what does tracert default to on Windows?

A

ICMP echo requests

17
Q

What are two similar tools to traceroute on Linux, Mac, and Windows?

A

mtr: linux and mac, pathping: windows

18
Q

What tools act as long running trace routes so you can see how things change over a period of time?

A

mtr and pathping

19
Q

What tool that acts as a long Running traceroute runs in real time and will continually update its output with all the current aggregate data about traceroute?

A

mtr

20
Q

what tool that acts is a long running trace route runs for 50 seconds and then displays the final aggregate data all at once?

A

pathping

21
Q
A

The Bits and Bytes of Networking (32 decks)

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