نظري وطب

PPP is designed to be a flexible protocol that can support different types of network layer protocols
True
False
In PAP, the user's identity and password are sent in plaintext across the PPP link to the remote device for verification
True
False
Exchange routing information and determine the best path for forwarding IP packets within a network
True
False
OSPF uses cost-based routing, which means that it selects the best path for data traffic based on the lowest cost, rather than the shortest path
True
False
Disadvantages: OSPF can be complex to configure and maintain and may require significant resources to operate efficiently
True
False
LSAs contain the state and cost of each directly connected link
True
False
On of Frame Relay advantage Cost-effective
True
False
Virtual Private Network (VPN) is a technology that allows users to securely connect to a private network over the internet
True
False
The MRU size specifies the minimum size of the packets that can be sent over the link.
True
False
PAP is one of the authentication protocols THAT NOT supported by PPP.
True
False
PAP is a more secure authentication protocol compared to CHAP since it uses a challenge-response mechanism to protect against replay attacks.
True
False
OSPF is highly scalable and CAN’T support large networks with many routers and subnets.
True
False
The frequency of link-state updates in OSPF depends on the stability of the only.
True
False
However, OSPF routers also use a feature called "aging" to ensure that LSAs are retained in the network indefinitely.
True
False
Leased lines - Public dedicated lines leased from a telecom carrier.
True
False
VPN works by using a combination of decryption and tunneling protocols to create a secure connection between the user's device and the private network.
True
False
LCP stand for
Lower Control Panel
Live Control Protocol
Link Access Protocol
Link Control Protocol
PAP stand for
Public Access Profile.
Procedure And Practice.
Password Authentication Protocol.
Port Authentication protocol.
OSPF (Open Shortest Path First) it is
Distance Vector Routing protocols.
Path-Vector Routing Protoco
Link-State Routing Protocols
All above
OSPF has a ....................... Which means that it can quickly adapt to changes in the network topology.
Link-state protocol
Fast convergence
Scalability.
Multiple paths.
Advantages of OSPF provides:
Fast convergence.
Supports large networks
Allows for easy scalability.
All above
Which of the following is the most commonly used version in OSPF
OSPF
OSPFv2
OSPFv3
OSPFv4
Share information about their local network topology with other routers in the network called:
Link-state advertisements (LSAs)
SPF algorithm
Multiarea OSPF
None of the above
By default, LSAs in OSPF have a lifetime of ................ , after which they are removed from the network.
30 minutes
35 minutes.
60 minutes.
40 minutes.
This command displays the current OSPF configuration and status
Show IP OSPF.
Show IP OSPF Interface.
Show IP OSPF Neighbor
Show IP OSPF Database.
Uses public infrastructure like the Internet to provide secure connections between the branch and central network.
VPN.
WAN
LAN
MAN
Is a networking protocol used to establish a PPP connection over an Ethernet network
VPN
OSPF.
PPPoE
None of the above.
It works by dividing data into small frames, which are then transmitted over a shared network infrastructure to their destination
Frame Relay.
Leased lines.
All above.
None of the above.
Frame Relay advantage:
Scalable
Flexible.
Fast setup time.
All above
MPLS provides several benefits, including
Quality of service (QoS) support.
Reliability
Authentication
Quantity
The major characteristics of WANs is They use the services of common carriers/ service provider.
True
False
Router is not one of the WAN Devices
True
False
WANs differ from LANs in several ways, one of them WAN → greater geographic distances.
True
False
HDLC is stand for High level data link control.
True
False
PPP is not stand for point to point protocol.
True
False
Circuit switching is a technique that directly connects the sender and the receiver in an broken path.
True
False
It is possible for a packet to be delivered if one of the nodes on its way is crashed momentarily. Thus all its queued packets may be lost.
True
False
N both packet switching methods, a message is broken into small parts, called packets.
True
False
The packets take a variety of possible paths through the network
True
False
No need for complete end-to-end path before communication can take place
True
False
The physical layer is responsible for wire or wireless connection between network nodes
True
False
…………….. Is a data communications network that extends across a large geographic area to interconnect LANs
MAN
WAN
LAN
Backbone
WAN……………. A multiport internetworking device used in service provider networks
Switches
Router
CSU/DSU
Communication Server
An example of leased line ?
Fiber Optic
DSL
Satellite
ALL
Disadvantages of Packet switching
It can add some initial costs in implementation.
Possible long wait to establish a connection, (10 seconds, more on long- distance or international calls.) during which no data can be transmitted.
More expensive than any other switching techniques, because a dedicated path is required for each connection
Inefficient use of the communication channel, because the channel is not used when the connected systems are not using it.
192.168.1.0 belongs to which of these classes ?
A
B
C
F
130.10.10.10 belongs to which of these classes ?
A
B
V
F
What is the mask for this ip 190.16.0.0
255.255.255.0
255.0.0.255
255.255.0.0
255.255.255.254
In packet switching, the ……… signal from your phone is converted into a ………. Data stream
Analog,Digital
Wave,Light
Energy,Power
Even,Odd
End-user software such as web browsers and email clients
Presentation Layer
Application Layer
Session Layer
Transport Layer
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