Chapter 17 - Supplement - Sheet1 Flashcards Preview

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Flashcards in Chapter 17 - Supplement - Sheet1 Deck (64)
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1

Protocol Analyzers

AKA sniffers / network monitors. Uysed to capture packets in their raw format as they cross the network.

2

Examples of protocol analyzers

Wireshare, OmniPeek

3

Promiscuous Mode

NIC processes all packets that it sees

4

Throughput Testers

Usually software based, work much like a protocol analyzer in that they measure traffic, but these measure throughput of that traffic (network speeds)

5

Connectivity Software

Designed to allow you to make a connection to a machine, its desktop, and perform any action you could perform while sitting in front of it.

6

Traceroute

(AKA trace) displays the path a packet takes to get to a remote device by using IP Packet TTL, time-outs, and ICMP error messages.

7

ipconfig / ifconfig

Display the current configuration of TCP/IP on a given workstation. Includes IP, DNS, WINS config and default gateway

8

OSes that use ipconfig

New Macs, Windows

9

ipconfig /all

ipconfig option that gives you hardware addresses, DHCP lease times, and DNS addresses

10

ipconfig /release & ipconfig /renew

Renews the IP address lease, or gets a new one if applicable.

11

OSes that use ifconfig

Linxus, Unix, Mac

12

ifconfig

ipconfig equivalent. Short for interface configuration

13

2 purposes to using the ping utility

To find out if a host is responding OR to find out if you can reach a host

14

ping -t

Pings the specified host until stopped

15

ping -a

Resolves addresses to hostnames

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ping - n *count*

Specified the number of echo requests to send. Default is 4. (4 "Reply from...")

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ping -w *timeout*

Set the timeout time in milliseconds. Default is 1000, which is 1 second

18

ARP

Address Resolutin Protocol. Used to translate TCP/IP addresses to MAC addresses using broadcasts.

19

ARP Table

Windows table that includes a list of TCP/IP addresses and their associated physical (MAC) addresses. Cached in memory to reduce the need to perform lookups

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2 Types of Entries in the ARP Table

Dynamic and Static

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Dynamic ARP table entries

Created whenever the Windows TCP/IP stack performs an ARP lookup but the MAC address isn't found in the ARP table. When MAC address is finally resolved (via Broadcast) that info is added to the table.

22

Static ARP table entries

Manually added MAC addresses.

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arp -a

Dispays current ARP entries.

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arp -g

Dispays current ARP entries. Same as arp -a

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arp -a -v

Verbose ARP entries - shows all invalid entires and regular arp -a entries

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arp -s [IP Address] [MAC Address]

Add a static entry into the ARP table

27

Unix's version of nslookup

dig

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nslookup

Allows you to query a name server and quickly find out which name resolves to which ip address

29

Location of hosts table on Windows

C:\Windows\System32\drivers\etc\

30

DOS Command to display the PC name

hostname