IS 3413 Telecom Huddleston Exam 2023| Questions with solved solutions| Graded A+

IS 3413 Telecom Huddleston Exam 2023| Questions with solved solutions| Graded A+































Transport Layer (Layer 4) - CORRECT ANSWER-Links application and network layers

Responsible for segmentation & reassembly

Session management

Network Layer (Layer 3) - CORRECT ANSWER-Responsible for addressing & routing

Transmission Control Protocol (TCP) - CORRECT ANSWER-Most common transport layer protocol

Used for reliable transmission of data

Connection-oriented

User Datagram Protocol (UDP) - CORRECT ANSWER-Used in time-sensitive situations, for control messages, when reliability less critical or handled by application layer

Connectionless

Linking to the Application Layer - CORRECT ANSWER-Ports used to identify application (2-byte numbers, 0 to 1)

Client ports are usually high-numbered ephemeral ports (>1024)

HTTP: TCP port 80
SMTP: TCP port 25
POP3: TCP port 110

Segmenting - CORRECT ANSWER-Breaking up large files into smaller segments (and putting back together)

Session Management - CORRECT ANSWER-Using a session: connection-oriented messaging (TCP)

three-way handshake: SYN, SYN-ACK, ACK

Sending messages w/o a session: connectionless messaging (UDP)

Internet Protocol (IP) - CORRECT ANSWER-IPv4: 32-bit addresses (232 or ~4.29 billion possible)


IPv6:128-bit addresses (2128 or ~3.4 × 1038 possible)

Routing - CORRECT ANSWER-Identifying what path to have a packet take through a network from sender to receive

Routing Tables - CORRECT ANSWER-Used to make routing decisions

Shows path to use to reach given destination

Kept by computers making routing decisions

Centralized Routing - CORRECT ANSWER-(host-based networks, uncommon)
Routing decisions made by one computer

Decentralized Routing - CORRECT ANSWER-(used by the Internet)
Decisions made by each node independently, with data exchange

Static Routing - CORRECT ANSWER-Fixed routing tables, manually configured

Dynamic Routing - CORRECT ANSWER-(sometimes called adaptive routing) Routers exchange data using protocols to update tables

Distance Vector - CORRECT ANSWER-based on the number of "hops" between two devices

Link State - CORRECT ANSWER-based on number of hops, circuit speed & traffic congestion

Routing Information Protocol (RIP) - CORRECT ANSWER-Dynamic distance vector protocol
Useful in smaller, less complex networks

Open Shortest Path First (OSPF) - CORRECT ANSWER-Dynamic link state protocol
Most widely used on large enterprise networks

EIGRP - CORRECT ANSWER-Enhanced Interior Gateway Routing Protocol

IS-IS - CORRECT ANSWER-Intermediate System to Intermediate System

ICMP - CORRECT ANSWER-Internet Control Message Protocol

Simplest possible interior routing protocol, Limited ability to update routing tables (ping command)

BGP - CORRECT ANSWER-Border Gateway Protocol

Exterior routing.

Used to exchange information between autonomous systems

Unicast - CORRECT ANSWER-one computer to another computer (default)

Broadcast - CORRECT ANSWER-one computer to all computers in subnet

Multicast - CORRECT ANSWER-one computer to a group of computers

hosts dynamically join and leave multicast groups using Internet Group Management Protocol (IGMP)

ARP - CORRECT ANSWER-Address Resolution Protocol

DNS - CORRECT ANSWER-Domain Name Service

Data link layer (MAC) Address Resolution - CORRECT ANSWER-Identify data link layer address of the next device in the circuit

Gateways - CORRECT ANSWER-Packet moves from Physical layer to Data Link Layer through the Network Layer (no higher)