Quick Tips 2

Question 1

BLANK resolves hostnames into IP addresses and has distributed databases all over the Internet to provide name resolution.

Answer 1

DNS

Question 2

Altering an ARP table so an IP address is mapped to a different MAC address is called BLANK and can redirect traffic to an attacker’s computer or an unattended system.

Answer 2

ARP poisoning

Question 3

BLANK (screening routers) is accomplished by ACLs and is a first generation firewall. Traffic can be filtered by addresses, ports, and protocol types.

Answer 3

Packet filtering

Question 4

BLANK protocols move frames from one network to another by placing them inside of routable encapsulated frames.

Answer 4

Tunneling

Question 5

BLANK provides application independence, high performance, and scalability, but it provides low security and no protection above the network layer.

Answer 5

Packet filtering

Question 6

Firewalls that use BLANK transfer an isolated copy of each approved packet from one network to another network.

Answer 6

proxies

Question 7

An BLANK requires a proxy for each approved service and can understand and make access decisions on the protocols used and the commands within those protocols.

Answer 7

application proxy

Question 8

BLANK firewalls also use proxies but at a lower layer. BLANK firewalls do not look as deep within the packet as application proxies do.

Answer 8

Circuit-level, Circuit -level

Question 9

A BLANK is the middleman in communication. It does not allow anyone to connect directly to a protected host within the internal network. BLANK are BLANK generation firewalls.

Answer 9

proxy firewall, Proxy firewalls, second

Question 10

BLANK firewalls provide high security and have full application layer awareness, but they can have poor performance, limited application support, and poor scalability.

Answer 10

Application proxy

Question 11

BLANK keeps track of each communication session. It must maintain a state table that contains data about each connection. It is a BLANK generation firewall.

Answer 11

Stateful inspection, third

Question 12

BLANK can use PPTP, L2TP, SSL, or IPSec as tunneling protocols.

Answer 12

VPN

Question 13

BLANK works at the data link layer and can only handle one connection. BLANK works at the network layer and can handle multiple tunnels at the same time.

Answer 13

PPTP, IPSec

Question 14

BLANK are usually the most expensive type of WAN connectivity method because the fee is based on the distance between the two destinations rather than on the amount of bandwidth used. T1 and T3 are examples of BLANK.

Answer 14

Dedicated links, dedicated links

Question 15

BLANK and BLANK are packet-switched WAN technologies that use virtual circuits instead of dedicated ones.

Answer 15

Frame relay, X.25

Question 16

A BLANK in star topologies serves as the central meeting place for all cables from computers and devices.

Answer 16

switch