Application Layer 1 Flashcards

1
Q

DHCP למה משמש פרוטוקול?

A

הינו פרוטוקול שכבת האפליקציה DHCP
IP אשר מאפשר למחשב לקבל כתובת
וכן מידע נוסף, למשל
gateway

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2
Q

DHCP למה משמש המנגנון של?

A

למידה של פרטים הכרחיים לתקשורת ברשת

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3
Q

What is the DNS protocol?

A

The Domain Name System (DNS) is a hierarchical protocol that translates human-readable domain names into IP addresses for network communication. DNS uses UDP on port 53 by default but can fall back to TCP for larger responses.

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4
Q

What are TLDs?

A

Top Level Domains - in charge of domains such as com, org, net and all “country” domains.

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5
Q

local DNS resolver מה עושה שרת ה?

A

ROOT פונה לשרתי ה
והיררכית לכל השרתים שמתחתיו עד שהוא מגיע
host ל
המבוקש.

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6
Q

What is the HTTP protocol?

A

The Hypertext Transfer Protocol (HTTP) is an application-layer protocol used for transferring web content between clients (browsers) and servers. It typically runs over TCP (port 80 for HTTP, port 443 for HTTPS).

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7
Q

What does “non-persistent HTTP” mean?

A
  1. At most 1 object sent over the TCP connection
  2. Connection then closes.
  3. Downloading multiple objects requires multiple connections.
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8
Q

What does “persistent HTTP” mean?

A

multiple objects can be sent over single TCP connection between client and server

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9
Q

what is “regular proxy”?

A
  • Caching content, security and business logic, privacy, anonymity, hides clients
  • Requires configuration of the browser
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10
Q

what is “transparent proxy”?

A
  • Does not require browser configuration, hence “transparent” to the client
  • Analyzes the packets and operates accordingly
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11
Q

what is “reverse proxy”?

A
  • Server-side proxying, instead of client-side
  • Hides servers and servers’ technology, cache content, load balancing
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12
Q

What is the SMTP protocol?

A

The Simple Mail Transfer Protocol (SMTP) is an application-layer protocol used for sending emails between mail servers. It operates over TCP. Emails are pushed from one server to another until they reach the recipient’s mail server.

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13
Q

PTR מהי שאילתת?

A

IP מיפוי מכתובת
לשם דומיין

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14
Q

MX מהי שאילתת?

A

ממפה משם דומיין לשם של שרת הדואר של אותו דומיין

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15
Q

NS מהי שאילתת?

A

ממפה משם הדומיין לשם של שרת השמות של אותו דומיין

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16
Q

CNAME מהי שאילתת ?

A

ממפה משם הדומיין לשם אחר של הדומיין

17
Q

TXT מהי שאילתת?

A

ממפה דומיין לרשומת טקסט

18
Q

A מהי שאילתת?

A

IP ממפה משם דומיין לכתובת