The Network DNA

JUNE 17, 2024

CCNA: TCP 3-Way Handshake In this article, lets take a look at TCP three-way handshake and other useful information that makes TCP a reliable communication protocol. Before TCP can send any traffic, it first contacts the other device and establish a reliable and controlled connection.

TCP 52

TCP Ethernet Port LAN 52

SysAdmin1138 Explains

MAY 28, 2024

I work from home, so the existence of internet is critical to me getting paid, and neither cell phone has good enough service to hotspot reliably. Looking at the packet trace of the behind the router case saw the TCP handshake finish, but TLS handshake fail after the initial hello. Thus, having two ISPs. What the actual f**k.

TCP 52

TCP Routers VPN Internet 52

Network Engineering

APRIL 4, 2023

24 network to have access to the internet over the 192.168.1.1 I put firewall rules on Pfsense that lets all traffic everywhere (TCP, UDP and ICMP). 24 network can't get on the internet. I can connect to the OpenVPN on the pfsense (from the internet), but when connected, I can't access anything except Pfsense. 24 network.

Routers 130

Routers TCP Internet Gateway 130

Network Engineering

JANUARY 17, 2025

What I do not understand is how I can really determine my correct MTU and MSS My setup:: Internet cable modem (bridged mode) pfsense WAN interface (ix1, automatically set to MTU 1500) When I ping from pfSense via the WAN interface the MTU is 1472. Reasonable as there are 8 Bytes for the ICMP header and 20 Bytes for the IP header.

WAN 130

WAN TCP LAN Gateway 130

The Network DNA

JUNE 19, 2024

CCNA: TCP Sequence & Port Number This article can be read as the second part of the previous article CCNA: 3-Way Handshake where we discussed what makes TCP a reliable protocol for transmitting information. Lets discuss the TCP SEQ and Port numbers in this article. TCP breaks this information into two pieces CC and NA.

Port 52

Port TCP Ethernet LAN 52

NW Kings

DECEMBER 10, 2024

Understanding TCP ports is essential for managing network traffic and ensuring effective communication. But what is a TCP port? This blog will delve into what a TCP port is, how it works, its significance in networking, and the different types of ports, including well-known and dynamic ports. What is a TCP Port?

UDP port 40

UDP port TCP Port IP Address 40

Network Engineering

SEPTEMBER 26, 2015

The HQ network is using PAT to gain access to the internet, the internal webserver needs to be accessed from the internet using static NAT. ip nat inside source list PAT pool PAT overload ip nat inside source static tcp 192.168.30.10 Configs: S_HQ ! interface FastEthernet0/1 switchport access vlan 10 ! Serial0/0/0 ! 255.255.255.0

IP Address 130

IP Address TCP Internet Network 130

PubNub

NOVEMBER 13, 2023

Learn about TCP/IP, the foundation of the internet. Discover its functions, including addressing, routing, reliable data delivery, and more.

TCP 40

TCP Internet 40

Kentik

OCTOBER 4, 2021

billion users in what can arguably be considered the most impactful internet service outage in modern history. Before the outage, UDP delivering traffic-intensive video dominated the volume of traffic volume while TCP constituted a minority. billion users attempting in vain to reconnect to their services.

TCP 145

TCP DNS Server Media 145

Engineering at Meta

MAY 22, 2024

Today, the internet (like most digital infrastructure in general) relies heavily on the security offered by public-key cryptosystems such as RSA, Diffie-Hellman (DH), and elliptic curve cryptography (ECC). But the advent of quantum computers has raised real questions about the long-term privacy of data exchanged over the internet.

TCP 107

TCP Encryption Server Bandwidth 107

High Scalability

AUGUST 22, 2018

While the internet and the web are inherently decentralized, mainstream applications built on top do not have to be. We're still waiting on Pied Piper to deliver the decentralized internet. Typically, applications today—Facebook, Salesforce, Google, Spotify, etc.—are —are all centralized. That wasn't always the case.

Internet 88

Internet TCP DNS Protocol 88

Confluent

OCTOBER 10, 2019

The Internet of Things (IoT) is getting more and more traction as valuable use cases come to light. MQTT: This is built on top of TCP/IP for constrained devices and unreliable networks, applying to many (open source) broker implementations and many client libraries. No license costs or hardware modifications are required.

IoT 20

IoT Internet Protocol Cloud 20

Kentik

SEPTEMBER 20, 2021

Routers and switches : The internet is largely a mesh configuration of network devices that provide connectivity to everywhere we want to connect. Packet loss in TCP connections results in retransmissions which can introduce significant latency. Below is the beginning of a TCP handshake. Router hops introduce the most.

TCP 116

TCP Routers Bandwidth IP Address 116

TDAN

NOVEMBER 6, 2024

To fully understand IoT, one should know what the internet is first. Simply speaking, the internet is the abbreviation of internetworking, i.e., network of networks.

IoT 52

IoT TCP Internet Protocol 52

CloudFaire

DECEMBER 9, 2024

The 2024 Cloudflare Radar Year in Review is our fifth annual review of Internet trends and patterns observed throughout the year at both a global and country/region level across a variety of metrics. Key Findings Traffic Global Internet traffic grew 17.2% Google maintained its position as the most popular Internet service overall.

Internet 96

Internet Email IP Address TCP 96

Packet Pushers

MAY 2, 2024

Internet Control Message Protocol (ICMP) is the protocol that lets you test reachability: Pings, echoes, TCP connections, etc. Internet Control Message Protocol (ICMP) is the protocol that lets you test reachability: Pings, echoes, TCP connections, etc.

TCP 52

TCP Protocol Internet 52

CATO Networks

APRIL 26, 2016

Anyone with hands-on experience setting up long-haul VPNs over the Internet knows its not a pleasant exercise. It lies at the core of how the Internet was built, its protocols, and how service providers implemented their routing layer. From the early days of the Internet, routers were shaped by technical constraints.

Internet 52

Internet Routers MPLS Protocol 52

Kentik

AUGUST 25, 2017

Google sped up TCP/IP. And Wired put together an interactive map to show where internet trolls live. Akamai’s latest 2017 State of the Internet Report went live this week. How Google is Speeding Up the Internet (NetworkWorld). TCP/IP is the internet’s main protocol for data transmission.

Data Centers 40

Data Centers Internet Network Networking 40

CloudFaire

MARCH 18, 2025

The Network Layer page includes insights from analysis of network and transport layer attacks, as well as observed TCP resets and timeouts. Bots get a dedicated page As a reminder, bot traffic describes any non-human Internet traffic, and monitoring bot levels can help spot potential malicious activities.

Email 88

Email Application Network Networking 88

CloudFaire

DECEMBER 27, 2024

Todays roundup blog post shares two exciting updates across our platform: our cross-platform 1.1.1.1 & WARP applications (consumer) and device agents (Zero Trust) now use MASQUE , a cutting-edge HTTP/3 -based protocol, to secure your Internet connection. Additionally, DEX is now available for general availability.

Protocol 99

Protocol Internet Encryption DNS 99

Kentik

JANUARY 13, 2021

Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved. In some cases if ICMP is filtered, you can usually switch to TCP (Transmission Control Protocol) and use tcping, telnet, or another TCP-based method to check for reachability.

Network 114

Network Networking TCP Protocol 114

The Network DNA

JUNE 10, 2024

This table is required for the firewall to maintain and translate private IP addresses to public ones, allowing communication over the internet. TCP, UDP, ICMP). Session Information: The xlate table stores TCP and UDP session state information, such as established connections and timeouts. Free Tools.

Firewall 52

Firewall IP Address TCP Port 52

Teimouri

FEBRUARY 1, 2024

The internet, which hums with information that connects, informs, and entertains us, is the vitality of the twenty-first century. Although one of these protocols, the ancient TCP, has been a good fit for us for many years, its shortcomings are becoming more noticeable as our online needs grow.

Protocol 52

Protocol Network Networking TCP 52

CATO Networks

MAY 21, 2018

Todays business lives and depends on the Internet. More and more companies rely on the Internet for voice and video. The public Internet, though, is a challenging environment to deliver business-quality real-time services. The public Internet reorganizes to solve issues without regard for the impact on applications.

Internet 40

Internet MPLS WAN Media 40

CATO Networks

DECEMBER 24, 2019

With more assets in the cloud, branch offices were required to send traffic back to the secure Internet gateway in the datacenter. Furthermore, their ability to extract value out of every bit of capacity became less relevant when with Internet prices offices could have 20x more capacity than they did with MPLS.

WAN 52

WAN Network Networking MPLS 52

Kentik

JANUARY 10, 2022

If you’re a person who works from home, you almost certainly have to deal with occasional internet connection issues. Connect time : Prior to downloading the entire web page, a TCP connection is established between your PC and the application. The use of ICMP vs. TCP or UDP to carry the ping can also be a factor.

IP Address 98

IP Address DNS TCP Application 98

CloudFaire

DECEMBER 30, 2024

Internet protocol specifications are instructions designed for engineers to build things. The Internet is central to everyone's lives, and we depend on these implementations. This is essentially Cloudflares front door HTTP requests that come to Cloudflare from the Internet pass through us first. You can read more about HTTP/1.1

Protocol 111

Protocol Server Internet TCP 111

Kentik

JANUARY 24, 2022

Source port for UDP or TCP, 0 for other protocols. Destination port for UDP or TCP, type and code for ICMP, or 0 for other protocols. Looking at NetFlow, IPFIX (Internet Protocol Flow Information Export), or even sFlow (a standardized protocol similar to NetFlow) records today, you will find that most everything runs on port 80 or 443.

Application 96

Application IP Address DNS Port 96

CATO Networks

JUNE 1, 2020

For example, the trombone effect (the inefficient backhauling of cloud bound traffic through a specific network endpoint) often meant MPLS connectivity to cloud assets was worse than standard Internet connections. As a result, businesses turned to SD-WAN and Internet-based VPN solutions as an alternative. The solution?

Network 52

Network Networking TCP MPLS 52

Kentik

SEPTEMBER 10, 2021

If I don’t like the results from the above, I might launch a ping or a TCP traceroute to see if I get any packet loss or high-latency responses. If the response comes back like the above, I’ll probably reboot my computer, my internet router or maybe both and hope that this fixes the problem. We know this.

Application 113

Application Cloud Routers IP Address 113

The Network DNA

JULY 16, 2024

CCNA RnS #11: Ethernet/MAC Addressing - The Network DNA CCNA RnS #10 - Fiber-optics Cable - The Network DNA CCNA RnS Article #9 -- Ethernet UTP cable & Ethernet Frame CCNA RnS Article #8 Ethernet LAN Communication CCNA RnS Article #7 - Ethernet Standards CCNA R&S Article #6 Understanding Ethernet Local Area Network CCNA R&S Article #5 (..)

Protocol 98

Protocol Ethernet IP Address LAN 98

CATO Networks

AUGUST 11, 2020

Public Internet Routing: A Buzzkill for Productivity Legions of workers who are now home-based are using their public Internet connections to access their Amazon WorkSpaces. If the workers packets need to traverse the entire path to the Amazon US East datacenter over the public Internet, the distance they travel will be quite long.

TCP 52

TCP IP Address Internet Application 52

DoorDash Engineering

AUGUST 15, 2023

With these hooks, we can intercept and understand TCP and UDP connections across our multiple Kubernetes clusters. For TCP, we use two probes to track when a connection is initiated and when it is closed. maps"); To emit a TCP connection event, we await the tcp_close call associated with the connection established by tcp_connect.

DNS 84

DNS TCP Application Network 84

High Scalability

AUGUST 13, 2018

While the internet and the web are inherently decentralized, mainstream applications built on top do not have to be. We're still waiting on Pied Piper to deliver the decentralized internet. Typically, applications today—Facebook, Salesforce, Google, Spotify, etc.—are —are all centralized. That wasn't always the case.

Internet 46

Internet TCP DNS Protocol 46

CATO Networks

JUNE 14, 2023

MAC address in the data link layer of a packet capture Moving up the stack, at the network and transport layers, is a much more granular source of information, the TCP/IP stack. In Figure 3 and Figure 4, we can see a packet capture of a MacBook laptop initiating a TCP connection to a remote server.

IoT 52

IoT TCP Protocol Network 52

Kentik

MAY 8, 2023

Additional network resilience mechanisms Successfully routing a packet over the internet from its source to its destination is not trivial. Message integrity and guaranteed delivery with TCP/IP Because IP does not require acknowledgments from endpoints, it does not ensure delivery; therefore, it is considered an unreliable protocol.

Network 52

Network Networking IP Address TCP 52

The Network DNA

JULY 31, 2024

CCNA RnS #11: Ethernet/MAC Addressing - The Network DNA CCNA RnS #10 - Fiber-optics Cable - The Network DNA CCNA RnS Article #9 -- Ethernet UTP cable & Ethernet Frame CCNA RnS Article #8 Ethernet LAN Communication CCNA RnS Article #7 - Ethernet Standards CCNA R&S Article #6 Understanding Ethernet Local Area Network CCNA R&S Article #5 (..)

IP Address 98

IP Address Ethernet Routers NIC Card 98