Chapter 10 & 11 Network +

Front 1

What is a database system that translates a computer's fully qualified domain name into an IP address?

Back 1

Domain Name System (DNS)

Front 2

What type of file preceded DNS when the internet was very young, that functioned similar to DNS. The file contained a list of IP addresses for every computer on the Internet?

Back 2

HOSTS file

Front 3

In a HOSTS file, what symbol indicates a line is a comment?

Back 3

#

Front 4

When do HOSTS files update on every system?

Back 4

2AM every morning

Front 5

Where is the first place the OS looks to resolve a name?

Back 5

HOSTS file

Front 6

what is the maximum number of characters in a DNS name?

Back 6

255

Front 7

What is the term that describes the complete domain name for a specific computer or host on the internet?

Back 7

Fully Qualified Domain Name (FQDN)

Front 8

What are the 2 parts that make up a FQDN?

Back 8

-Hostname
&
-Top level domain

Front 9

What would the host name be for www.indiana.edu?

Back 9

www

Front 10

what would be the top level domain for www.indiana.edu?

Back 10

.edu

Front 11

what would be the domain for www.indiana.edu?

Back 11

indiana.edu

Front 12

what are the 3 ways that a computer tries to resolve a name?

Back 12

-Broadcast
-HOSTS file
-Querying a DNS server

Front 13

Using an internet domain name to find an IP address is known as what?

Back 13

Forward lookup zone

Front 14

what command can you run from a command prompt to resolve an internet domain name?

Back 14

nslookup

Front 15

Explain how you would troubleshoot a possible dns problem?

Back 15

-type ipconfig /flushdns
-ping a well-known website like www.google.com
-if it times out ping a known ip address
-if you get a response then the dns server is down

Front 16

What are secondary zones used for?

Back 16

To take over in the event that the DNS server for the primary zone goes down

Front 17

What naming resolution system was created by Microsoft that broadcast its name to a small network?

Back 17

NetBIOS

Front 18

Microsoft runs NetBIOS over what?

Back 18

TCP/IP

Front 19

NetBIOS over TCP/IP is known as what?

Back 19

CIFS

Front 20

If a windows system needs to access a another computers folders or files what does it use?

Back 20

CIFS

Front 21

If a windows system need to access the internet what does it use?

Back 21

DNS server

Front 22

What are the 3 groups that CIFS organizes windows computers into?

Back 22

-workgroup
-windows domain
-active directory

Front 23

How do you view NetBIOS cache?

Back 23

nbtstat -n

Front 24

What is an authentication protocol for TCP/IP that has no connection to PPP?

Back 24

Kerberos

Front 25

Kerberos uses what port?

Back 25

TCP port 88

Front 26

What are the 2 processes of the Key Distribution Center in Kerberos?

Back 26

-Authentication Server (AS)
-Ticket-Granting Service

Front 27

What machine is the Key Distribution Center installed on?

Back 27

Domain Controller

Front 28

Briefly explain the kerberos process.

Back 28

-client sends request that includes hash to the authenticating server.
-Server replies with a ticket granting ticket and time stamp.
-client sends the ticket granting ticket to the ticket granting server
-ticket granting server sends a token to the client that allows access to resources

Front 29

The token in kerberos is known as what?

Back 29

SID (security identifier)

Front 30

Any encryption that uses the same key for both encryption and decryption is called what?

Back 30

symmetric-key algorithm

Front 31

Someone that wants to decrypt a symmetric key algorithm must have what 2 things?

Back 31

-key
-algorithm

Front 32

Most symmetric-key algorithms are what?

Back 32

Block ciphers

Front 33

What type of symmetric key algorithm uses a block cipher with a 64 bit block and a 56 bit key?

Back 33

Data Encryption Standard (DES)

Front 34

What type of symmetric key algorithm is used in a number of TCP/IP applications and uses a stream cipher?

Back 34

Rivest Cipher 4 (RC4)

Front 35

What type of symmetric key algorithm uses a 128 bit block cipher with a 128, 192, or 256 bit key?

Back 35

Advanced Encryption Standard (AES)

Front 36

What are some drawbacks to symmetric key encryption?

Back 36

-Anyone with key can encrypt or decrypt
-Need to send the key to the other person

Front 37

What type of encryption uses one key to encrypt and a different key to decrypt?

Back 37

Asymmetric-Key Algorithm

Front 38

Which key in asymmetric key cryptography is used to encrypt the data?

Back 38

Public key

Front 39

What term describes the guarantee that data is originally sent and came from a trusted source?

Back 39

Nonrepudiation

Front 40

What are the 3 mechanisms that enable nonrepudiation?

Back 40

-Hashing
-PKI
-Digital signatures

Front 41

What is a mathematical function that you run on a string of binary digits of any length that results in a value of some fixed length that is irreversible?

Back 41

Hash

Front 42

The result of a hash is known as what?

Back 42

checksum or digest

Front 43

what is an encrypted link between two computers?

Back 43

Tunnel

Front 44

What is a PPP wrapper that applications can use to accept one of many types of authentication that has significant use in wireless networks?

Back 44

Extensible authentication protocol (EAP)

Front 45

What form of authentication is used in wireless networks with a shared secret code that's stored on both the wirless access point and the wirless client and uses AES encryption?

Back 45

EAP-PSK (personal shared key)

Front 46

What is a standardized type of digital signature that includes the digital signature of a third party, a person or a company that guarantees that who is passing out this certificate truly is who they say they are?

Back 46

Digital certificate

Front 47

What is the name of the most popular certificate authority?

Back 47

VeriSign

Front 48

What secure TCP/IP application is used to query the state of network devices, such as CPU usage, network utilization, and uses agents to collect information from a MIB?

Back 48

Simple network management protocol (SNMP)

Front 49

What port numbers does SNMP use?

Back 49

161
162

Front 50

The philosophy of AAA means what?

Back 50

-Authentication
-Authorization
-Accounting

Front 51

What are 2 standards that implement AAA?

Back 51

-RADIUS
-TACACS+

Front 52

What encryption protocol works at the Network layer and operates in transport mode and tunnel mode?

Back 52

IPSec

Front 53

In what mode does only the actual payload of the IP packet get encrypted?

Back 53

Transport mode

Front 54

In what mode is the entire IP packet encrypted into an IPsec endpoint and then encapsulated inside another IP packet?

Back 54

Tunnel mode

Front 55

What encryption was invented as a secure replacement for Telnet that uses RSA keys?

Back 55

SSH

Front 56

Why is SSH used?

Back 56

For tunneling