The following table provides summary statistics for permanent job vacancies with a requirement for X.21 skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited X.21 over the 3 months to 24 April 2017 with a comparison to the same period in the previous 2 years.

X.21
UK
3 months to
24 Apr 2017
Same period 2016 Same period 2015
Rank 862 960 971
Rank change year-on-year +98 +11  
Permanent jobs citing X.21 2 7 15
As % of all permanent IT jobs advertised in the UK 0.002% 0.007% 0.013%
As % of the Communications & Networking category 0.015% 0.039% 0.073%
Number of salaries quoted 0 3 15
Median salary - £32,500 £50,000
Median salary % change year-on-year - -35.00%  
UK excluding London median salary - £27,500 £50,000
% change year-on-year - -45.00%  

X.21 is in the communications and computer networking skills category. The next table is for comparison with the above and provides summary statistics for all permanent job vacancies with a requirement for communications and computer networking skills.

Communications & Computer Network Skills
UK
Permanent job vacancies with a requirement for communications and computer networking skills 13586 17913 20608
As % of all permanent IT job vacancies advertised in the UK 15.84% 17.18% 18.31%
Number of salaries quoted 11028 14845 16376
Median salary £45,000 £45,000 £45,000
90% offered a salary of more than £27,500 £26,500 £27,500
10% offered a salary of more than £67,500 £67,500 £65,000
UK excluding London median salary £40,000 £42,500 £42,500
% change year-on-year -5.88% -  

X.21
Job Vacancy Trend

The job posting trend of jobs advertised citing X.21 as a proportion of all permanent or contract IT jobs with a match in the Communications & Networking category.

Job vacancy trend for X.21 in the UK

X.21
Salary Trend

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing X.21.

Salary trend for X.21 in the UK

X.21
Top 4 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing X.21 within the UK over the 3 months to 24 April 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Permanent
IT Job Ads
Median Salary
Last 3 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
England +86 2 - -
South East +63 2 - -
Berkshire +34 2 - -
Reading - 2 - -

For the 6 months to 24 April 2017, IT jobs citing X.21 also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all job ads with a requirement for X.21.

1 2 (100.00%) ITIL
1 2 (100.00%) WAN
1 2 (100.00%) Ethernet
1 2 (100.00%) PPP
1 2 (100.00%) SNMP
1 2 (100.00%) Cisco
1 2 (100.00%) CCNA
1 2 (100.00%) Cisco Certification
1 2 (100.00%) MPLS
1 2 (100.00%) OSPF
1 2 (100.00%) BGP
1 2 (100.00%) DSL
1 2 (100.00%) L2TP
1 2 (100.00%) Change Management
1 2 (100.00%) Firewall
1 2 (100.00%) ITSM
1 2 (100.00%) IPsec
1 2 (100.00%) xDSL
1 2 (100.00%) Network Management

X.21
Co-occurring IT Skills by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Communications & Networking
1 2 (100.00%) BGP
1 2 (100.00%) DSL
1 2 (100.00%) Ethernet
1 2 (100.00%) Firewall
1 2 (100.00%) IPsec
1 2 (100.00%) L2TP
1 2 (100.00%) MPLS
1 2 (100.00%) OSPF
1 2 (100.00%) PPP
1 2 (100.00%) SNMP
1 2 (100.00%) WAN
1 2 (100.00%) xDSL
Job Titles
1 2 (100.00%) Network Engineer
1 2 (100.00%) Network Operations Engineer
1 2 (100.00%) Operations Engineer
Processes & Methodologies
1 2 (100.00%) Change Management
1 2 (100.00%) ITIL
1 2 (100.00%) ITSM
1 2 (100.00%) Network Management
Qualifications
1 2 (100.00%) CCNA
1 2 (100.00%) Cisco Certification
Vendors
1 2 (100.00%) Cisco