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A WAN interconnects LANs over long distances.
A WAN is a public utility that enables access to the Internet.
WAN is another name for the Internet.
A WAN is a LAN that is extended to provide secure remote network access.
Addressing
Bandwidth
Privacy
Security
WAN Technology
Higher cost
Fixed capacity
Less flexibility
Higher latency
Cable
Leased line
Ethernet WAN
Municipal Wi-Fi
Digital subscriber line
It supports the SONET standard, but not the SDH standard​.
It enables bidirectional communications over one pair of copper cables.
It can be used in long-range communications, like connections between ISPs.
It assigns incoming electrical signals to specific frequencies.
ISDN
MPLS
Frame Relay
Ethernet WAN
Cable
DSL
Frame Relay
MetroE
VPN
VPN gateway
VPN appliance
VPN concentrator
VPN client software
Dial-up connection
Leased line connection
Site-to-site VPN over the Internet
Remote access VPN over the Internet
2
12
24
28
Ethernet
PPPoE
HDLC
PPP
PP can use synchronous and asynchronous circuits.
PPP can only be used between two Cisco devices.
PPP carries packets from several network layer protocols in LCPs.
PPP uses LCPs to establish, configure, and test the data-link connection.
PPP uses LCPs to agree on format options such as authentication, compression, and error detection.
The PPP link will be closed down if the link quality drops below 70 percent.
The NCP will send a message to the sending device if the link usage reaches 70 percent.
The LCP establishment phase will not start until the bandwidth reaches 70 percent or more.
The PPP link will not be established if more than 30 percent of options cannot be accepted.
Spreading traffic across multiple physical WAN links
Dividing the bandwidth of a single link into separate time slots
Enabling traffic from multiple VLANs to travel over a single Layer 2 link
Creating one logical link between two LAN switches via the use of multiple physical links
The usernames do not match each other.
The usernames do not match the host names.
The passwords for CHAP should be in lowercase.
The username r1 should be configured on the router R1 and the username r2 should be configured on the router R2.
Application
Transport
Network
Data link
Physical
DSL upload and download speeds are always the same.
DSL is faster.
DSL has no distance limitations.
DSL is not a shared medium.
Wi-Fi Mesh
Mobile broadband
WiMax
Satellite
DSL
Dialup analog modem
Dialup ISDN modem
T1
That the Dialer1 interface has been manually assigned an IP address
That the Dialer1 interface is up and up
That the Dialer1 interface has been assigned an IP address by the ISP router
That the IP address on R1 G0/1 is in the same network range as the DSL modem
NHRP
ARP
NAT
IPsec
To manage the transportation of IP multicast and multiprotocol traffic between remote sites
To provide packet level encryption of IP traffic between remote sites
to support basic unencrypted IP tunneling using multivendor routers between remote sites
to provide fixed flow-control mechanisms with IP tunneling between remote sites
IGP routing protocols
Static routing
EGP routing protocols
Default routing
2
3
4
5
172.16.2.0 to 172.16.2.255
172.16.2.1 to 172.16.3.254
172.16.2.0 to 172.16.3.255
172.16.2.1 to 172.16.255.255
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Here's an interesting quiz for you.