Quick Tips 1

Question 1

BLANK firewalls can be bypassed if the operating system does not have packet forwarding or routing disabled.

Answer 1

Dual-homed

Question 2

A BLANK is a set of rules that dictates how computers communicate over networks.

Answer 2

protocol

Question 3

The BLANK layer, layer BLANK, has services and protocols required by the user’s applications for networking functionality.

Answer 3

application, 7

Question 4

• The BLANK layer, layer BLANK, formats data into a standardized format and deals with the syntax of the data, not the meaning.

Answer 4

presentation, 6

Question 5

Routers work at the BLANK layer, layer BLANK.

Answer 5

network, 3

Question 6

The BLANK layer, layer BLANK, sets up, maintains, and breaks down the dialog (session) between two applications. It controls the dialog organization and synchronization.

Answer 6

session, 5

Question 7

The BLANK layer, layer BLANK, provides end-to-end transmissions.

Answer 7

transport, 4

Question 8

The BLANK layer, layer BLANK, provides routing, addressing, and fragmentation of packets. This layer can determine alternative routes to avoid network congestion.

Answer 8

network, 3

Question 9

The BLANK layer, layer BLANK, prepares data for the network medium by framing it. This is where the different LAN and WAN technologies work.

Answer 9

data link, 2

Question 10

The BLANK layer, layer BLANK, provides physical connections for transmission and performs the electrical encoding of data. This layer transforms bits to electrical signals.

Answer 10

physical, 1

Question 11

BLANK is a suite of protocols that is the de facto standard for transmitting data across the Internet. BLANK is a reliable, connection-oriented protocol, while BLANK is an unreliable, connectionless protocol.

Answer 11

TCP/IP, TCP, IP

Question 12

Data are BLANK as they travel down the network stack on the source computer, and the process is reversed on the destination computer. During BLANK, each layer adds its own information so the corresponding layer on the destination computer knows how to process the data.

Answer 12

encapsulated, encapsulation

Question 13

Two main protocols at the transport layer are BLANK and BLANK.

Answer 13

TCP, UDP

Question 14

BLANK is a connectionless protocol that does not send or receive acknowledgments when a datagram is received. It does not ensure data arrives at its destination. It provides “best-effort” delivery.

Answer 14

UDP

Question 15

BLANK is a connection-oriented protocol that sends and receives acknowledgments. It ensures data arrive at the destination.

Answer 15

TCP

Question 16

BLANK translates the IP address into a MAC address (physical Ethernet address), while BLANK translates a MAC address into an IP address.

Answer 16

ARP, RARP

Question 17

BLANK works at the network layer and informs hosts, routers, and devices of network or computer problems. It is the major component of the ping utility.

Answer 17

ICMP