Topic 4 - WAN Technologies Flashcards Preview

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Flashcards in Topic 4 - WAN Technologies Deck (22)
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1

PPP - Types of Authentication

PAP, CHAP and EAP

2

What is PAP (Password Authentication Protocol)?

2 way Authentication.
The username and password are usually sent in plain text. t.

3

What is CHAP (Challenge-Handshake Authentication Protocol)?

3 way authentication
the remote router sends a challenge to a router that is trying to communicate. The router then responds with an encrypted username and password and if the parameters are correct, the remote router accepts the PPP connection

4

What is the benefit of point-to-point leased line?

Flexibility of design
&
Simply configuration

5

Which command can you enter to verify that a BGP connection to a remote device is established?

show ip bgp summary

6

Which two components are used to identify a neighbor in a BGP configuration?

autonomous system number & IP address

7

At which layer of the OSI model does PPP perform?

Layer 2

8

PPPoE

Point-to-Point Protocol over Ethernet, It Encapsulates PPP frames inside Ethernet frame. Also, offers Authentication, Encryption and Compression.

9

How many bits are added to Over head in PPPoe?

PPP adds 2 bytes and PPPoE adds 6 bytes.
So, 1500 - 8 = 1492 (MTU)

10

GRE?

Generic routing encapsulation (GRE) is a simple site-to-site VPN tunneling protocol.
- Tunnel IP packet across the Internet.
- GRE can encapsulate any OSI layer 3 protocol,
- GRE tunnel interface address will be on same subnet.

11

GRE Stateless?

GRE is Stateless and do not include flow control.

12

DSCP Value

Default, EF, Class selector and AF ( Assured forwarding )

13

IP precedence bits and DSCP Bits in QOS Marking

IP - 3bits and DSCP - 6 bits

14

What TCP port number does BGP use?

Port 179

15

Which packet-switched WAN technology offers high-bandwidth connectivity capable of managing data, voice, and video all on the same infrastructure?

Metro Ethernet

16

HDLC

High-level Data Link Control) is a bit-oriented synchronous data link protocol used for serial communications.

HDLC is the default encapsulation on serial interfaces of Cisco routers

17

Which statement about RADIUS security is true?

It supports EAP authentication for connecting to wireless networks.

18

Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?

PPP

19

Which protocol is an open standard protocol framework that is commonly used in VPNs to provide secure end-to-end communications?

IPsec

20

Which PPP subprotocol negotiates authentication options?

LCP - Link Control Protocol

21

What devices must configure the clock rate on a point-to-point link?

DCE

The DCE device controls the communication and should have the clock rate set.

22

Which PPP sub-protocol is responsible for allowing PPP to support multiple network protocols?

NCP

The NCP protocol allows PPP to function with different network protocols, such as IP or IPX.