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CCNA 200-301 > 3. Fundamentals of WAN > Flashcards

3. Fundamentals of WAN Flashcards

1
Q

What are different names for a leased line

A 
Serial Link
Point to point 
T1
WAN link
Private line
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2
Q

What are the two most used datalink protocols for leased lines1

A

HDLC

PPP

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3
Q

What does HDLC stand for

A

High-Level Data Link Control

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4
Q

What does PPP stand for

A

Point to Point Protocol

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5
Q

What are the parts of the HDLC headers and compare them to an Ethernet frame

A 
Flag - Preamble/SFD
Address - Destination MAC
Control - N/A - no longer used today
Type - Type
FCS - FCS
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6
Q

Draw an HDLC frame

A

Flag 1 byte | Address 1 byte| Control 1 byte | Type 2byte | Data (variable) | FCS 2 byte

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7
Q

What is in a Cisco HDLC frame that’s different from ISO HDLC

A

Type

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8
Q

What are disadvantages with Leased Lines

A

higher cost
longer lead times to get service installed
slower compared to today’s standards (10Mbps)

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9
Q

What is the router on a customer’s site called

A

Customer Premise Equipment (CPE)

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10
Q

Where does the customer’s CPE connect to on the telco side

A

Telco switch

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11
Q

What are different names for Ethernet WAN

A

Ethernet Line Service (E-Line)
Ethernet emulation
Ethernet over MPLS (EoMPLS)

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12
Q

What kind of connections are used in lease lines

A

serial connections

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13
Q

Where does a customer’s router connect to

A

Service Provider Point of Presence (PoP)

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14
Q

What is the focus of Internet Protocol (IP)

A

Routing data in the form of IP packets form source host to destination host

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15
Q

What is the size of a IPv4 header

A

20 Bytes

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16
Q

What are the general steps for routing protocols to learn routes

A
  1. Each router adds a route to its routing table for each subnet directly connected.
  2. Each router’s routing protocol tells its neighbors about the routes in its routing table including directly connected routes and routes learned from other routers
  3. After learning new route from neighbor, it adds route to its IP table with neighbor as next hop
17
Q

What are the two parts to ARP

A

ARP Request

ARP Reply

18
Q

What are the 2 foundantional rules of subnetting

A
  1. Two IP addresses not separated by a router must be in the same subnet
  2. Two IP addresses separated from each other by at least one router must be in different subnets
19
Q

What is the size of an IPv4 address

A

32 bits

20
Q

What are the 2 foundational rules of subnetting

A
  1. Two IP addresses not separated by a router must be in the same subnet
  2. Two IP addresses separated from each other by at least one router must be in different subnets
21
Q

What is a routing protocol

A

Protocol used by routers to build routes and maintain routing table

CCNA 200-301 (8 decks)

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