Week 3

Question 1

How many channels can 5g support?

Answer 1

up to 20 channels from multiple frequencies

Question 2

What is CoMP?

Answer 2

•Cooperative MIMO•Can combine channels from multiple cell

Question 3

Features of Cell Phones

Answer 3

• Accelerometers
• Gyroscope
• Magnetometer
• GPS
• Touchscreens
• Bluetooth
• NFC
• Wifi

Question 4

What is SMTP?

Answer 4

Simple Mail Transport Protocol
•Used to move messages between mail agents
•Store and forward approach
•Current standard allows up to 7 days (168hr) for final deliver

Question 5

smtp example

Answer 5

S: 220 smtp.example.com ESMTP Postfix
C: HELO relay.example.org
S: 250 Hello relay.example.org, I am glad to meet you
C: MAIL FROM:
S: 250 Ok
C: RCPT TO:
S: 250 Ok
C: RCPT TO:
S: 250 Ok
C: DATA
S: 354 End data with .

Question 6

SMTP•Two basic versions?

Based on acknowledgement process

Answer 6

• HELO•Next hop only•Most common

* EHLO•Two hops •Increasingly common

Question 7

Client Retrieval Protocol•Multiple protocols available.

Name 3:

Answer 7

• POP - Post Office Protocol
• IMAP - Internet Mail Access Protocol
• MAPI -
• Microsoft proprietary
• Also available in open source
• Both Retrieval and sending

Question 8

what are the types of instant messaging?

•Two Generic types

Answer 8

•Peer-to-peer
Both parties need to be online at the same time

Store-and-forward
•Message is store on a server until retrieved/pushed to recipient
•Most common

Question 9

Two primary uses of instant messaging

Answer 9

•Consumer (CIM)
Personal/ small business
ISP/ Vendor hosted
•Enterprise (EIM)
Large corporations
Self/ 3rd party hosted

Question 10

Instant messaging issues?

Answer 10

• Interoperability
• No standard protocols
• Multiple clients
• Some level of interconnection

Question 11

Issues with BYOD?

Answer 11

Confidentiality
•Access of private information•Release of corporate information•Lost device•Stolen •Snooping
Integrity
•Multiple copies of data•Unauthorized change
Security
•Malware•Internal Hacking

Question 12

Solution to byod?

Answer 12

• Network isolation
• Internal security
• Authorized attachment

Question 13

Active Directory Integration

What is a Schema Partition?

Answer 13

• Contains a blueprint of all objects and properties in Active Directory.
• When you create an object such as a user, it’s instantiated from the user blueprint in Active Directory.
• Adds many object classes
• Extend many existing object class

Question 14

Configuration Partition?

Answer 14

•Contains information used throughout the forest.
•All DCs use the same Configuration Partition in that particular Active Directory forest
.•All changes to the Configuration Partition have to be replicated to all DCs.
•All Exchange Server information is stored in the Configuration Partition.

Question 15

Domain Partition?

Answer 15

• Contains information regarding the domains
• Every domain has its own Domain Partition, so if there are 60 domains installed, there will be 60 different Domain Partitions.
• User information is stored in the Domain Partition
• Thus Mailbox information is stored here
• Also some exchange groups and accounts are found here

Question 16

Who developed the first mail system on ARPANET?

Answer 16

Ray Tomlinson, 1972

Question 17

What does SMTP stand for?

Answer 17

Simple Mail Transport Protocol