2nd Exam

Physical Topology

How the network is physically installed

Logical Topology

How the network works conceptually (how data flows)

Routing Tables

Tables on a router that determine where the router will send packets on the network.

(T/F) Cost assessment is used to look at the relative cost of technologies used in a network design.

True

(T/F) Hub-based Ethernet is a star physical topology and a bus logical topology.

True

(T/F) The campus backbone is usually faster than the backbones used inside buildings.

True

(T/F) The most common protocol for dynamic addressing in TCP/IP networks is the Dynamic Host Configuration Protocol.

True

HTTPS port number

443

DNS port number

53

HTTP Port Number

80

Static Routing

- Fixed routing tables - Manually configured by network managers - Local adjustments when computers added or removed

Centralized Routing

-Routing decisions made by one computer -Not common anymore

Dynamic Routing

-routing tables updated periodically -routers exchange information using protocols to update tables

Class A Range

1-126 (Uses 1st byte)

POP3 Port Number

110

Class B Range

128-191 (Uses 1st and 2nd bytes)

IMAP Port Number

143

Class C Range

192-223 (Uses 1st, 2nd and 3rd bytes)

FTP Port Number

20, 21

SSH Port Number

22

Telnet Port Number

23

SMTP Port Number

25

Subnet

A logical subset of a larger network, created by an administrator to improve network performance or to provide security.

Decentralized Routing

Decisions made by each node independently of one another

(T/F) A VLAN requires the computer manager to reconfigure the physical cables to the switch if a computer is moved from one port to another port on a switch.

False

(T/F) An access point plays the same role in a wireless network as a router does in a wired Ethernet network.

False

(T/F) Cut-through switching has fewer errors than store and forward switching.

False

(T/F) Routed backbones use switches that move packets based on data link layer addresses.

False

Wired Ethernet Standard

IEEE 802.3

TCP 3-way handshake

Sender sends a SYN, Receiver sends a SYN-ACK, Sender sends an ACK

UDP (User Datagram Protocol)

Used when the sender needs to send a single small packet to the receiver

turnpike effect

When the network is used to a greater extent than was anticipated.

IPv4 uses ________ bytes per Internet address. a) 4 b) 32 c) 8 d) 24 e) 16

a) 4

Transmission Control Protocol/Internet Protocol was developed for _________ in 1974. a) ARPANET b) IBM c) Hewlett-Packard d) University of Minnesota e) Xerox

a) ARPANET

The network architecture component which enables users to access the network is the ______. a) LAN b) building backbone c) campus backbone d) enterprise edge e) WAN

a) LAN

Nowadays, most organizations use a simpler approach to network design called the ___________ approach. a) building-block b) frame definition c) prototype d) systems development life cycle e) guided network

a) building-block

Which of the following would NOT be a type of circuit that needs to be considered when planning for technology design capacity? a) 1000 Mbps b) Ethernet c) 10 Mbps d) 100 Mbps e) 1 Gpbs

b) Ethernet

Which of the following is NOT a basic LAN component? a) client b) PAD c) server d) network interface card e) network operating system

b) PAD

The ______ layer links the application layer with the network layer is responsible for end-to-end delivery of messages. a) physical b) transport c) session d) presentation e) data link

b) transport

Which of the following is not a type of hardware device that can be used to interconnect networks? a) layer 3 switches b) routers c) dumb terminals d) layer 2 switches e) all of the above can be used

c) dumb terminals

The newer form of IP, version 6 (IPv6): a) Is running out of address space to support the growth of the Internet. b) has a 20 byte header c) has an increased address size from 32 bits to 128 bits d) does not include version number in its header e) does not include hop limit in its header

c) has an increased address size from 32 bits to 128 bits

Switched backbone networks: a) always use a ring topology b) are the least common type of BN used in one building c) use a star topology with one device, usually a switch d) switch the traffic based on layer 3 addresses e) require much more management than do routed backbone networks

c) use a star topology with one device, usually a switch

A _______ type of BN has a star topology with a switch at its center resulting in all devices on the BN segment being part of the same IP network. a) Bridged backbone b) Virtual LAN c) Hubbed backbone d) Switched backbone e) Routed backbone

d) Switched backbone

A logical bus topology: a) is always used by token ring protocol LANs b) has all computers connected to each other in point-to-point connecting c) is limited to short distances since devices like a hub or repeater cannot be used with this type of topology d) permits every message to be received by every computer on the bus, even when those messages are intended for other computers e) has a central control device, such as a mainframe

d) permits every message to be received by every computer on the bus, even when those messages are intended for other computers

The goal of the needs analysis step is to produce a ___________, or a statement of the network elements necessary to meet the needs of the organization. a) building block b) access layer c) core layer d) cost assessment e) logical network design

e) Logical network design

100Base-T: a) supports 100 Mbps data rate b) is inexpensive c) runs on twisted pair d) is more dominant than token ring e) all of the answers are correct

e) all of the answers are correct

Ports

used to identify application (2-byte numbers)