Deck 9: Tcp-Ip Internet Working 2

Question 1

________ is a general naming system for the Internet.

A)NAT
B)DNS
C)DHCP
D)Dotted decimal notation

Answer 1

B

Question 2

In DNS,a group of resources under the control of an organization is called a ________.

A)network
B)subnet
C)scope
D)domain

Answer 2

D

Question 3

Your firm has an 8-bit network part and an 8-bit subnet part.How many hosts can you have per subnet?

A)126
B)254
C)534
D)65,534

Answer 3

D

Question 4

Which of the following can be used within a firm?

A)private IP addresses
B)public IP addresses
C)both A and B
D)neither A nor B

Question 5

How many DNS root servers are there?

A)1
B)2
C)10
D)13

Question 6

".edu" is a ________.

A)root domain
B)top-level domain
C)second-level domain
D)none of the above

Question 7

You have a 20-bit network part and a 4-bit subnet part.How many hosts can you have per subnet?

A)14
B)16
C)254
D)none of the above

Question 8

Most corporations wish to have ________ domain names.

A)top-level
B)second-level
C)third-level
D)none of the above

Question 9

Which of the following is true about NAT?

A)It can enhance security.
B)It presents problems for some protocols.
C)both A and B
D)neither A nor B

Question 10

If you have a subnet part of 7 bits,how many subnets can you have?

A)126
B)254
C)510
D)none of the above

Question 11

".com" is a ________.

A)root domain
B)top-level domain
C)second-level domain
D)none of the above

Question 12

Your firm has an 8-bit network part.If you need at least 250 subnets,what must your subnet part size be?

A)5
B)6
C)7
D)8

Question 13

The domain name system ________.

A)is a way to find a host's IP addresses if your computer only knows the host's host name
B)is a general naming system for the Internet
C)both A and B
D)neither A nor B

Question 14

NAT enhances security by ________.

A)preventing sniffers from learning internal IP addresses
B)encryption
C)both A and B
D)neither A nor B

Question 15

In NAT,the ________ creates new external source IP addresses and port numbers.

A)router
B)firewall
C)source host
D)destination host

Question 16

________ is the process of presenting external IP addresses that are different from internal IP addresses used within the firm.

A)DNS
B)NAT
C)DHCP
D)none of the above

Question 17

If your subnet part is 8 bits long,you can have ________ subnets.

A)64
B)128
C)256
D)254

Question 18

In IP subnet planning,you need to have at least 130 subnets.How large should your subnet part be?

A)6
B)7
C)8
D)none of the above

Question 19

The highest-level DNS servers are called ________.

A)root servers
B)top-level servers
C)both A and B
D)neither A nor B

Question 20

Which of the following is a private IP address range?

A)10.x.x.x
B)128.171.x.x
C)both A and B
D)neither A nor B

Question 21

In SNMP,companies are often reluctant to use ________ commands because of security dangers.

A)Get
B)Set
C)trap
D)request

Question 22

A company receives its domain name from ________.

A)IETF
B)its ISP
C)a domain registrar
D)its parents

Question 23

The main disadvantage of transport mode protection compared to tunnel mode protection in IP is ________.

A)that it provides protection over only part of the route
B)higher cost
C)both A and B
D)neither A nor B

Question 24

Which is less expensive to implement?

A)SSL/TLS
B)IPsec
C)Both cost about the same to implement.

Question 25

IPsec provides protection in two modes of operation; one of these two modes is ________.

A)transport mode
B)data link mode
C)network mode
D)802.1X mode

Question 26

Which mode of IPsec may be more expensive if a company has a large number of computers?

A)transport mode
B)tunnel mode
C)Both A and B are equally expensive.

Question 27

In SNMP,the manager communicates directly with a(n)________.

A)managed device
B)agent
C)object
D)access point

Question 28

Which of the following would be an SNMP object?

A)number of rows in routing table
B)a managed switch
C)both A and B
D)neither A nor B

Question 29

Client PCs must have digital certificates in ________.

A)transport mode
B)tunnel mode
C)both A and B
D)neither A nor B

Question 30

Which of the following standards permits central management?

A)IPsec
B)SSL/TLS
C)both A and B
D)neither A nor B

Question 31

Which has stronger security?

A)SSL/TLS
B)IPsec
C)Both have about equal security.

Question 32

SNMPv1 uses ________ for authentication.

A)community names
B)digital certificates and digital signatures
C)a different password for each manager-agent pair
D)all of the above

Question 33

SNMPv3 uses ________ for authentication.

A)community names
B)digital certificates and digital signatures
C)a different password for each manager-agent pair
D)all of the above

Question 34

IPsec protects ________ layer messages.

A)data link
B)application
C)both A and B
D)neither A nor B

Question 35

Which of the following would be an SNMP object?

A)number of rows in routing table
B)system uptime (since last reboot)
C)both A and B
D)neither A nor B

Question 36

The main limit of IPsec tunnel mode protection compared to transport mode protection in IPsec is ________.

A)protection over only part of the route
B)higher cost
C)both A and B
D)neither A nor B

Question 37

In tunnel mode,IPsec provides protection ________.

A)all the way between the two hosts
B)only between the IPsec servers
C)both A and B
D)neither A nor B

Question 38

In IPsec,agreements about how security will be done are called ________.

A)tranches
B)security contracts
C)service-level agreements
D)security associations

Question 39

If a host is to be able to communicate via IPv4 and IPv6,it is said to ________.

A)be bilingual
B)have a dual-stack
C)be IPv6-ready
D)be IP-agile

Question 40

IPsec is used for ________ VPNs.

A)remote-access
B)site-to-site
C)both A and B
D)neither A nor B

Question 41

If the subnet ID in an IPv6 address is 32 bits,how long is the routing prefix?

A)16 bits
B)32 bits
C)64 bits
D)none of the above

Question 42

A step in creating an EUI-64 is dividing a 48-bit MAC address in half and inserting ________ in the center.

A)the interface ID
B)the subnet ID
C)fffe
D)0000

Question 43

Which is NOT one of the three parts of a public IPv6 unicast address?

A)subnet ID
B)routing prefix
C)host part
D)All of the above are parts in a public IPv6 unicast address.

Question 44

Which of the following can route non-IP packets?

A)OSPF
B)EIGRP
C)both A and B
D)neither A nor B

Question 45

To see if a target host can be reached,you normally would send it an ICMP ________ message.

A)echo request
B)error advisement
C)either A or B
D)neither A nor B

Question 46

A company is free to select whatever ________ dynamic routing protocol it wishes.

A)interior
B)exterior
C)both A and B
D)neither A nor B

Question 47

IP is reliable because of ________.

A)echo and echo reply messages
B)error advisement messages
C)both A and B
D)neither A nor B

Question 48

The part of an IPv6 global unicast address that designates the host is called the ________.

A)host part
B)interface ID
C)routing prefix
D)none of the above

Question 49

Today,it can be problematic to have only a single IPv6 stack because ________.

A)a single IPv4 stack is out of date
B)a single IPv6 stack could not communicate with a single IPv4 stack
C)a dual stack has become a common solution
D)all of the above

Question 50

In an IPv6 global unicast address,the interface ID is ________ bits long.

A)32
B)64
C)128
D)It varies.

Question 51

________ is an interior dynamic routing protocol.

A)OSPF
B)BGP
C)both A and B
D)neither A nor B

Question 52

The IEEE calls 64-bit interface addresses ________.

A)Extended Unique Identifiers
B)Interface IDs
C)MAC addresses
D)half-IP

Question 53

________ is used for supervisory messages at the internet layer.

A)TCP
B)DNS
C)DHCP
D)ICMP

Question 54

Dynamic ________ protocols allow routers to transmit routing table information to one another.

A)routing
B)transport
C)synchronization
D)none of the above

Question 55

Pinging is to send ICMP ________ messages to the target host.

A)echo request
B)error advisement
C)ping
D)echo

Question 56

The routing prefix in IPv6 is like the ________ part in an IPv4 address.

A)network
B)subnet
C)host
D)both A and B